diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30dbbfad3..87a6bacdf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,37 @@
 # Changelog
 
+## 0.2.8
+Released on March 29, 2023.
+
+### Key Features
+
+### Enhancements
+* Extends Aqueduct's parameter support to allow parameters to be `None` *if*
+    there is a default value for the parameter in the function definition.
+* Tweaks the design of the workflow details page to reduce the number of shades
+    of blue.
+* Updates SQL query parametrization scheme to use `$1`, `$2`, etc. as parameter
+    placeholders rather than the previous `{ param }` syntax. This allows a
+    paramter to be reused multiple times within the same query and is similar
+    to how traditional RDBMS interfaces work.
+* Adds context about the execution configuration of an operator to the workflow
+    details page. Now, each operator will show the logo of the engine on which
+    its running.
+
+### Bugfixes
+* Fixes bug where the metric history graph's X-axis would not reflect
+    timescales; all data points would be evenly spaced out rather than
+    reflecting the amount of time between each point.
+* Fixes bug where cross-environment Python requirements gathering would lead to
+    erroneous installation. Currently, Aqueduct only supports explicit
+    requirements specification.
+* Fixes bug where certain workflow failures would leave unfinished operators in
+    an infinitely-pending state; now, nodes are correctly marked as canceled.
+* Fixes bug where retrieving a non-existent filepath from S3 would return
+    succesfully but with empty data; now, a detailed error message is shown
+    instead.
+* Fixes bug where attempting to capture a system metric would thrown an error.
+
 ## 0.2.7
 Released on March 22, 2023.
 
diff --git a/manual_qa_tests/README.md b/manual_qa_tests/README.md
index d22565698..05e31713c 100644
--- a/manual_qa_tests/README.md
+++ b/manual_qa_tests/README.md
@@ -19,21 +19,21 @@ To run with more flexibility, configure the following commandline flags:
 
 ## Checklist
 * **Workflows** Page: 
-    * There should be **5** workflows. **4** Succeeded and **1** Failed if using `--example-notebooks`
-    * There should be **6** workflows. **3** Succeeded, **2** Failed, and **1** Registered if **not** using `--example-notebooks`
+    * There should be **15** workflows. **10** Succeeded, **2** Warning, **2** Failed, and **1** Registered if using `-example-notebooks`
+    * There should be **9** workflows. **4** Succeeded, **2** Warning, **2** Failed, and **1** Registered if **not** using `-example-notebooks`
 * **Notifications**: There should be **2** notifications for failed workflow.
 * **Workflow Details** Page: Each page should reflect the **workflow description**. Pay attention to any noted **sidesheets** behaviors in the description.
 * **Integration** Page:
-    * There should be **11** *Data* integrations, **5** *Compute* integrations, and **2** *Notifications* integrations.
-    * If you are not using additional integration, `aqueduct_demo` should be the only available one.
+    * There should be **1** *Cloud* integration, **11** *Data* integrations, **6** *Compute* integrations, and **2** *Notifications* integrations.
+    * If you are not using additional integration, `aqueduct_demo` should be the only available one. If you have passed in slack arguments to `initialize.py`, there should be two.
 * **Integration Details** Page:
     * In the **Workflows** section of the `aqueduct_demo` page:
-        * There should be **10** workflows if using `--example-notebooks`
-        * Ther should be **4** workflows if **not** using `--example-notebooks`
+        * There should be **13** workflows if using `--example-notebooks`
+        * There should be **7** workflows if **not** using `--example-notebooks`
     * If you are using `aqueduct_demo`, there should be **8** tables in **Data** section.
-* **Data** Page: There should be **5** data rows available.
+* **Data** Page: There should be **7** data rows available.
 * **Slack channel**:
-    * There should be **16** new notifications.
+    * If Slack flags are set, there should be **15** new notifications.
     * Each notification should have the following aspects:
         * A title including the workflow's name and status
         * Workflow name
diff --git a/sdk/setup.py b/sdk/setup.py
index 4830fc099..c1cea8e75 100644
--- a/sdk/setup.py
+++ b/sdk/setup.py
@@ -18,7 +18,7 @@
 
 setuptools.setup(
     name="aqueduct-sdk",
-    version="0.2.7",
+    version="0.2.8",
     author="Aqueduct, Inc.",
     author_email="hello@aqueducthq.com",
     description="Python SDK for the Aqueduct prediction infrastructure",
diff --git a/src/dockerfiles/Makefile b/src/dockerfiles/Makefile
index 7ae63eed9..d0d157d86 100644
--- a/src/dockerfiles/Makefile
+++ b/src/dockerfiles/Makefile
@@ -1,5 +1,5 @@
 .DEFAULT_GOAL = all
-VERSION = 0.2.7
+VERSION = 0.2.8
 
 # By default, turn off the Makefile practice of printing each command before
 # you run it.
diff --git a/src/dockerfiles/connectors/athena.dockerfile b/src/dockerfiles/connectors/athena.dockerfile
index 07648fb6f..f65e32cf1 100644
--- a/src/dockerfiles/connectors/athena.dockerfile
+++ b/src/dockerfiles/connectors/athena.dockerfile
@@ -1,4 +1,4 @@
-FROM aqueducthq/base_connector:0.2.7
+FROM aqueducthq/base_connector:0.2.8
 
 MAINTAINER Aqueduct <hello@aqueducthq.com> version: 0.1
 
diff --git a/src/dockerfiles/connectors/bigquery.dockerfile b/src/dockerfiles/connectors/bigquery.dockerfile
index 2cf23d653..fb494be8e 100644
--- a/src/dockerfiles/connectors/bigquery.dockerfile
+++ b/src/dockerfiles/connectors/bigquery.dockerfile
@@ -1,4 +1,4 @@
-FROM aqueducthq/base_connector:0.2.7
+FROM aqueducthq/base_connector:0.2.8
 
 MAINTAINER Aqueduct <hello@aqueducthq.com> version: 0.1
 
diff --git a/src/dockerfiles/connectors/mysql.dockerfile b/src/dockerfiles/connectors/mysql.dockerfile
index 5d8160a58..4c366cb15 100644
--- a/src/dockerfiles/connectors/mysql.dockerfile
+++ b/src/dockerfiles/connectors/mysql.dockerfile
@@ -1,4 +1,4 @@
-FROM aqueducthq/base_connector:0.2.7
+FROM aqueducthq/base_connector:0.2.8
 
 MAINTAINER Aqueduct <hello@spiralai.co> version: 0.1
 
diff --git a/src/dockerfiles/connectors/postgres.dockerfile b/src/dockerfiles/connectors/postgres.dockerfile
index f5b1b818e..a4eab8b86 100644
--- a/src/dockerfiles/connectors/postgres.dockerfile
+++ b/src/dockerfiles/connectors/postgres.dockerfile
@@ -1,4 +1,4 @@
-FROM aqueducthq/base_connector:0.2.7
+FROM aqueducthq/base_connector:0.2.8
 
 MAINTAINER Aqueduct <hello@aqueducthq.com> version: 0.1
 
diff --git a/src/dockerfiles/connectors/s3.dockerfile b/src/dockerfiles/connectors/s3.dockerfile
index bc319e30f..89f16b613 100644
--- a/src/dockerfiles/connectors/s3.dockerfile
+++ b/src/dockerfiles/connectors/s3.dockerfile
@@ -1,4 +1,4 @@
-FROM aqueducthq/base_connector:0.2.7
+FROM aqueducthq/base_connector:0.2.8
 
 MAINTAINER Aqueduct <hello@aqueducthq.com> version: 0.1
 
diff --git a/src/dockerfiles/connectors/snowflake.dockerfile b/src/dockerfiles/connectors/snowflake.dockerfile
index c7c00fb53..bd6a1a3dc 100644
--- a/src/dockerfiles/connectors/snowflake.dockerfile
+++ b/src/dockerfiles/connectors/snowflake.dockerfile
@@ -1,4 +1,4 @@
-FROM aqueducthq/base_connector:0.2.7
+FROM aqueducthq/base_connector:0.2.8
 
 MAINTAINER Aqueduct <hello@aqueducthq.com> version: 0.1
 
diff --git a/src/dockerfiles/connectors/sqlserver.dockerfile b/src/dockerfiles/connectors/sqlserver.dockerfile
index 5e02358fa..5b62a76d1 100644
--- a/src/dockerfiles/connectors/sqlserver.dockerfile
+++ b/src/dockerfiles/connectors/sqlserver.dockerfile
@@ -1,4 +1,4 @@
-FROM aqueducthq/base_connector:0.2.7
+FROM aqueducthq/base_connector:0.2.8
 
 MAINTAINER Aqueduct <hello@aqueducthq.com> version: 0.1
 
diff --git a/src/dockerfiles/function/function310.dockerfile b/src/dockerfiles/function/function310.dockerfile
index d479a7c9a..9e84269db 100644
--- a/src/dockerfiles/function/function310.dockerfile
+++ b/src/dockerfiles/function/function310.dockerfile
@@ -16,7 +16,7 @@ pyarrow==7.0.0 \
 boto3==1.18.0 \
 pydantic==1.9.0 \
 scikit_learn==1.0.2 \
-aqueduct-ml==0.2.7
+aqueduct-ml==0.2.8
 
 ENV PYTHONUNBUFFERED 1
 
diff --git a/src/dockerfiles/function/function37.dockerfile b/src/dockerfiles/function/function37.dockerfile
index dc477f634..36ec54b30 100644
--- a/src/dockerfiles/function/function37.dockerfile
+++ b/src/dockerfiles/function/function37.dockerfile
@@ -16,7 +16,7 @@ boto3==1.18.0 \
 pydantic==1.9.0 \
 scikit_learn==1.0.2 \
 typing_extensions==4.3.0 \
-aqueduct-ml==0.2.7
+aqueduct-ml==0.2.8
 
 
 ENV PYTHONUNBUFFERED 1
diff --git a/src/dockerfiles/function/function38.dockerfile b/src/dockerfiles/function/function38.dockerfile
index 3f960ef49..2fba2bdeb 100644
--- a/src/dockerfiles/function/function38.dockerfile
+++ b/src/dockerfiles/function/function38.dockerfile
@@ -16,7 +16,7 @@ pyarrow==7.0.0 \
 boto3==1.18.0 \
 pydantic==1.9.0 \
 scikit_learn==1.0.2 \
-aqueduct-ml==0.2.7
+aqueduct-ml==0.2.8
 
 ENV PYTHONUNBUFFERED 1
 
diff --git a/src/dockerfiles/function/function39.dockerfile b/src/dockerfiles/function/function39.dockerfile
index 888555784..5af8efc85 100644
--- a/src/dockerfiles/function/function39.dockerfile
+++ b/src/dockerfiles/function/function39.dockerfile
@@ -16,7 +16,7 @@ pyarrow==7.0.0 \
 boto3==1.18.0 \
 pydantic==1.9.0 \
 scikit_learn==1.0.2 \
-aqueduct-ml==0.2.7
+aqueduct-ml==0.2.8
 
 ENV PYTHONUNBUFFERED 1
 
diff --git a/src/dockerfiles/gpu/py310_env.yml b/src/dockerfiles/gpu/py310_env.yml
index c16ec011d..7897fe5c2 100644
--- a/src/dockerfiles/gpu/py310_env.yml
+++ b/src/dockerfiles/gpu/py310_env.yml
@@ -14,4 +14,4 @@ dependencies:
   - pip:
     - scikit_learn==1.0.2
     - typing_extensions==4.3.0
-    - aqueduct-ml==0.2.7
+    - aqueduct-ml==0.2.8
diff --git a/src/dockerfiles/gpu/py37_env.yml b/src/dockerfiles/gpu/py37_env.yml
index de5176041..c344c0bdc 100644
--- a/src/dockerfiles/gpu/py37_env.yml
+++ b/src/dockerfiles/gpu/py37_env.yml
@@ -14,4 +14,4 @@ dependencies:
   - pip:
     - scikit_learn==1.0.2
     - typing_extensions==4.3.0
-    - aqueduct-ml==0.2.7
+    - aqueduct-ml==0.2.8
diff --git a/src/dockerfiles/gpu/py38_env.yml b/src/dockerfiles/gpu/py38_env.yml
index ff12b8816..bf7ce8ce9 100644
--- a/src/dockerfiles/gpu/py38_env.yml
+++ b/src/dockerfiles/gpu/py38_env.yml
@@ -14,4 +14,4 @@ dependencies:
   - pip:
     - scikit_learn==1.0.2
     - typing_extensions==4.3.0
-    - aqueduct-ml==0.2.7
\ No newline at end of file
+    - aqueduct-ml==0.2.8
\ No newline at end of file
diff --git a/src/dockerfiles/gpu/py39_env.yml b/src/dockerfiles/gpu/py39_env.yml
index 917d6a6cf..ca787c625 100644
--- a/src/dockerfiles/gpu/py39_env.yml
+++ b/src/dockerfiles/gpu/py39_env.yml
@@ -14,4 +14,4 @@ dependencies:
   - pip:
     - scikit_learn==1.0.2
     - typing_extensions==4.3.0
-    - aqueduct-ml==0.2.7
\ No newline at end of file
+    - aqueduct-ml==0.2.8
\ No newline at end of file
diff --git a/src/dockerfiles/lambda/function/requirements-37.txt b/src/dockerfiles/lambda/function/requirements-37.txt
index 17a7edd16..5987125f6 100644
--- a/src/dockerfiles/lambda/function/requirements-37.txt
+++ b/src/dockerfiles/lambda/function/requirements-37.txt
@@ -7,4 +7,4 @@ boto3==1.18.0
 pydantic==1.9.0
 scikit_learn==1.0.2
 typing_extensions==4.3.0
-aqueduct-ml==0.2.7
\ No newline at end of file
+aqueduct-ml==0.2.8
\ No newline at end of file
diff --git a/src/dockerfiles/lambda/function/requirements.txt b/src/dockerfiles/lambda/function/requirements.txt
index a81ed2221..3cfff70be 100644
--- a/src/dockerfiles/lambda/function/requirements.txt
+++ b/src/dockerfiles/lambda/function/requirements.txt
@@ -6,4 +6,4 @@ pyarrow==7.0.0
 boto3==1.18.0
 pydantic==1.9.0
 scikit_learn==1.0.2
-aqueduct-ml==0.2.7
\ No newline at end of file
+aqueduct-ml==0.2.8
\ No newline at end of file
diff --git a/src/dockerfiles/lambda/requirements.txt b/src/dockerfiles/lambda/requirements.txt
index 198555a43..456758be1 100644
--- a/src/dockerfiles/lambda/requirements.txt
+++ b/src/dockerfiles/lambda/requirements.txt
@@ -6,4 +6,4 @@ pydantic==1.9.0
 pyyaml
 SQLAlchemy==1.4.30
 typing_extensions==4.3.0
-aqueduct-ml==0.2.7
\ No newline at end of file
+aqueduct-ml==0.2.8
\ No newline at end of file
diff --git a/src/golang/lib/constants.go b/src/golang/lib/constants.go
index 48226faec..858bf720f 100644
--- a/src/golang/lib/constants.go
+++ b/src/golang/lib/constants.go
@@ -1,3 +1,3 @@
 package lib
 
-const ServerVersionNumber = "0.2.7"
+const ServerVersionNumber = "0.2.8"
diff --git a/src/python/bin/aqueduct b/src/python/bin/aqueduct
index 1823370da..69fa9651c 100755
--- a/src/python/bin/aqueduct
+++ b/src/python/bin/aqueduct
@@ -37,7 +37,7 @@ base_directory = os.path.join(os.environ["HOME"], ".aqueduct")
 server_directory = os.path.join(os.environ["HOME"], ".aqueduct", "server")
 ui_directory = os.path.join(os.environ["HOME"], ".aqueduct", "ui")
 
-package_version = "0.2.7"
+package_version = "0.2.8"
 aws_credentials_path = os.path.join(os.environ["HOME"], ".aws", "credentials")
 
 default_server_port = 8080
diff --git a/src/python/requirements.txt b/src/python/requirements.txt
index df70e4535..057a772d4 100644
--- a/src/python/requirements.txt
+++ b/src/python/requirements.txt
@@ -11,4 +11,4 @@ typing_extensions>=4.3.0,<=4.4.0
 Pillow<=9.4.0
 packaging<=23.0
 pymongo<=4.3.3
-aqueduct-sdk==0.2.7
+aqueduct-sdk==0.2.8
diff --git a/src/python/setup.py b/src/python/setup.py
index 75be4f8b6..87851c6b4 100644
--- a/src/python/setup.py
+++ b/src/python/setup.py
@@ -10,7 +10,7 @@
 
 setup(
     name="aqueduct-ml",
-    version="0.2.7",
+    version="0.2.8",
     install_requires=install_requires,
     scripts=["bin/aqueduct"],
     packages=find_packages(),
diff --git a/src/ui/app/package.json b/src/ui/app/package.json
index a87a838b4..3b22a3116 100644
--- a/src/ui/app/package.json
+++ b/src/ui/app/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@aqueducthq/ui",
   "author": "Aqueduct, Inc. <hello@aqueducthq.com>",
-  "version": "0.2.7",
+  "version": "0.2.8",
   "scripts": {
     "start": "parcel --no-cache index.html",
     "build": "parcel build --public-url /dist --dist-dir dist/default index.html",
@@ -9,7 +9,7 @@
     "lint:fix": "eslint '*/**/*.{js,ts,tsx}' --format table --fix"
   },
   "dependencies": {
-    "@aqueducthq/common": "0.2.7",
+    "@aqueducthq/common": "0.2.8",
     "@emotion/react": "^11.10.5",
     "@emotion/styled": "^11.10.5",
     "@fortawesome/fontawesome-svg-core": "^6.2.1",
diff --git a/src/ui/common/package-lock.json b/src/ui/common/package-lock.json
index 991ef6f70..f52b98337 100644
--- a/src/ui/common/package-lock.json
+++ b/src/ui/common/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@aqueducthq/common",
-  "version": "0.2.7",
+  "version": "0.2.8",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@aqueducthq/common",
-      "version": "0.2.7",
+      "version": "0.2.8",
       "hasInstallScript": true,
       "devDependencies": {
         "@babel/core": "^7.20.12",
diff --git a/src/ui/common/package.json b/src/ui/common/package.json
index 3bdb6acfb..1e69e1116 100644
--- a/src/ui/common/package.json
+++ b/src/ui/common/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@aqueducthq/common",
   "author": "Aqueduct <hello@aqueducthq.com>",
-  "version": "0.2.7",
+  "version": "0.2.8",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "alias": {
diff --git a/src/ui/common/src/components/workflows/ReactFlowCanvas.tsx b/src/ui/common/src/components/workflows/ReactFlowCanvas.tsx
index 04824f6ce..424667890 100644
--- a/src/ui/common/src/components/workflows/ReactFlowCanvas.tsx
+++ b/src/ui/common/src/components/workflows/ReactFlowCanvas.tsx
@@ -33,6 +33,26 @@ const ReactFlowCanvas: React.FC<ReactFlowCanvasProps> = ({
   );
 
   const { edges, nodes } = dagPositionState.result ?? { edges: [], nodes: [] };
+  if (edges.length === 0 || nodes.length === 0) {
+    // The DAG position state is still loading.
+    return null;
+  }
+
+  // This is a bit of a tricky check; when we switch between workflow versions, the selected DAG
+  // does not load in sync with the DAG positioning. As a result, we need to ensure
+  // that we only render the graph once the two sets of Redux state are in sync before
+  // proceeding; otherwise, our node IDs will be mismatched. Here, we simply check to see
+  // if the UUIDs for one of the nodes exists in the selected DAG. If it doesn't, that
+  // means the state has not synced yet, so we return null and wait for it to sync.
+  const testNode = nodes[0];
+  if (
+    (testNode.data.nodeType === ReactflowNodeType.Operator &&
+      !selectedDag.operators[testNode.id]) ||
+    (testNode.data.nodeType === ReactflowNodeType.Artifact &&
+      !selectedDag.artifacts[testNode.id])
+  ) {
+    return null;
+  }
 
   const defaultViewport = { x: 0, y: 0, zoom: 1 };
 
diff --git a/src/ui/common/src/components/workflows/workflowHeader.tsx b/src/ui/common/src/components/workflows/workflowHeader.tsx
index ae1b0eda8..4f2b94043 100644
--- a/src/ui/common/src/components/workflows/workflowHeader.tsx
+++ b/src/ui/common/src/components/workflows/workflowHeader.tsx
@@ -175,7 +175,7 @@ const WorkflowHeader: React.FC<Props> = ({ workflowDag }) => {
               <Box display="flex" flexDirection="row">
                 {engines.map((engine) => (
                   <Box ml={1} key={engine}>
-                    <ResourceItem engine={engine} />
+                    <ResourceItem resource={engine} />
                   </Box>
                 ))}
               </Box>