diff --git a/.github/workflows/build_gb_base.yml b/.github/workflows/build_gb_base.yml
index a353a7e..aa47c47 100644
--- a/.github/workflows/build_gb_base.yml
+++ b/.github/workflows/build_gb_base.yml
@@ -1,6 +1,9 @@
 name: geoBoundaries Base Image Build
 run-name: gB Base Build
-on: push
+on:
+  push:
+    branches: ['main']
+    paths: ['geoBoundaryBuilder/images/**']
 jobs:
   build-and-push:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/build_workpool_operator.yml b/.github/workflows/build_workpool_operator.yml
index 07beb2c..2f30edf 100644
--- a/.github/workflows/build_workpool_operator.yml
+++ b/.github/workflows/build_workpool_operator.yml
@@ -1,6 +1,9 @@
-name: geoBoundaries Base Image Build
+name: geoBoundaries Workpool Operator Build
 run-name: gB k8s Workpool Operator
-on: push
+on:
+  push:
+    branches: ['main']
+    paths: ['geoBoundaryBuilder/images/**']
 jobs:
   build-and-push:
     runs-on: ubuntu-latest
diff --git a/geoBoundaryBuilder/images/k8s_worker.Dockerfile b/geoBoundaryBuilder/images/k8s_worker.Dockerfile
index 0a44944..4dc0c24 100644
--- a/geoBoundaryBuilder/images/k8s_worker.Dockerfile
+++ b/geoBoundaryBuilder/images/k8s_worker.Dockerfile
@@ -2,6 +2,7 @@
 FROM prefecthq/prefect:3.1.6.dev6-python3.12-kubernetes
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
+                gnupg \
                 lsb-release && \
                 apt-get clean && rm -rf /var/lib/apt/lists/*