diff --git a/.github/workflows/deny.yml b/.github/workflows/deny.yml
new file mode 100644
index 00000000..3374fc36
--- /dev/null
+++ b/.github/workflows/deny.yml
@@ -0,0 +1,19 @@
+name: CI
+on: [push, pull_request]
+jobs:
+  cargo-deny:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        checks:
+          - advisories
+          - bans licenses sources
+
+    # Prevent sudden announcement of a new advisory from failing ci:
+    continue-on-error: ${{ matrix.checks == 'advisories' }}
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: EmbarkStudios/cargo-deny-action@v1
+      with:
+        command: check ${{ matrix.checks }}
diff --git a/anchor/Cargo.toml b/anchor/Cargo.toml
index e26bb46a..6ce780da 100644
--- a/anchor/Cargo.toml
+++ b/anchor/Cargo.toml
@@ -2,6 +2,7 @@
 name = "rad-anchor"
 version = "0.1.0"
 edition = "2018"
+license = "GPL-3.0-or-later"
 
 [dependencies]
 radicle-common = { path = "../common" }
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index 600d31b6..bd103b83 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -5,6 +5,7 @@ version = "0.6.0"
 authors = ["The Radicle Team <dev@radicle.xyz>"]
 edition = "2018"
 rust-version = "1.63"
+license = "GPL-3.0-or-later"
 
 [package.metadata.deb]
 assets = [
diff --git a/deny.toml b/deny.toml
new file mode 100644
index 00000000..f5c51f32
--- /dev/null
+++ b/deny.toml
@@ -0,0 +1,239 @@
+# This template contains all of the possible sections and their default values
+
+# Note that all fields that take a lint level have these possible values:
+# * deny - An error will be produced and the check will fail
+# * warn - A warning will be produced, but the check will not fail
+# * allow - No warning or error will be produced, though in some cases a note
+# will be
+
+# The values provided in this template are the default values that will be used
+# when any section or field is not specified in your own configuration
+
+# If 1 or more target triples (and optionally, target_features) are specified,
+# only the specified targets will be checked when running `cargo deny check`.
+# This means, if a particular package is only ever used as a target specific
+# dependency, such as, for example, the `nix` crate only being used via the
+# `target_family = "unix"` configuration, that only having windows targets in
+# this list would mean the nix crate, as well as any of its exclusive
+# dependencies not shared by any other crates, would be ignored, as the target
+# list here is effectively saying which targets you are building for.
+targets = [
+    # The triple can be any string, but only the target triples built in to
+    # rustc (as of 1.40) can be checked against actual config expressions
+    #{ triple = "x86_64-unknown-linux-musl" },
+    # You can also specify which target_features you promise are enabled for a
+    # particular target. target_features are currently not validated against
+    # the actual valid features supported by the target architecture.
+    #{ triple = "wasm32-unknown-unknown", features = ["atomics"] },
+]
+
+# This section is considered when running `cargo deny check advisories`
+# More documentation for the advisories section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/advisories/cfg.html
+[advisories]
+# The path where the advisory database is cloned/fetched into
+db-path = "~/.cargo/advisory-db"
+# The url(s) of the advisory databases to use
+db-urls = ["https://github.com/rustsec/advisory-db"]
+# The lint level for security vulnerabilities
+vulnerability = "deny"
+# The lint level for unmaintained crates
+unmaintained = "warn"
+# The lint level for crates that have been yanked from their source registry
+yanked = "warn"
+# The lint level for crates with security notices. Note that as of
+# 2019-12-17 there are no security notice advisories in
+# https://github.com/rustsec/advisory-db
+notice = "warn"
+# A list of advisory IDs to ignore. Note that ignored advisories will still
+# output a note when they are encountered.
+ignore = [
+    #"RUSTSEC-0000-0000",
+]
+# Threshold for security vulnerabilities, any vulnerability with a CVSS score
+# lower than the range specified will be ignored. Note that ignored advisories
+# will still output a note when they are encountered.
+# * None - CVSS Score 0.0
+# * Low - CVSS Score 0.1 - 3.9
+# * Medium - CVSS Score 4.0 - 6.9
+# * High - CVSS Score 7.0 - 8.9
+# * Critical - CVSS Score 9.0 - 10.0
+#severity-threshold =
+
+# If this is true, then cargo deny will use the git executable to fetch advisory database.
+# If this is false, then it uses a built-in git library.
+# Setting this to true can be helpful if you have special authentication requirements that cargo-deny does not support.
+# See Git Authentication for more information about setting up git authentication.
+#git-fetch-with-cli = true
+
+# This section is considered when running `cargo deny check licenses`
+# More documentation for the licenses section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/licenses/cfg.html
+[licenses]
+# The lint level for crates which do not have a detectable license
+unlicensed = "deny"
+# List of explicitly allowed licenses
+# See https://spdx.org/licenses/ for list of possible licenses
+# [possible values: any SPDX 3.11 short identifier (+ optional exception)].
+allow = [
+    "GPL-3.0", # ours
+    ###################################################
+    # All below are explained by FSF
+    # https://www.gnu.org/licenses/license-list.en.html
+    "MIT",
+    "Apache-2.0",
+    "Unlicense",
+    "ISC",
+    "WTFPL",
+    "CC0-1.0", # public domain
+    "BSD-2-Clause", # FreeBSD License
+    "BSD-3-Clause", # Modified BSD License
+    # https://blueoakcouncil.org/license-faq
+    # The Council doesn’t see any reason why software licensed under the Blue Oak Model License 1.0.0
+    # can’t be used, combined, and distributed with software under .. GPLv3
+    "BlueOak-1.0.0",
+    # https://www.mozilla.org/en-US/MPL/2.0/FAQ/ - This is copyleft - Q7 onwards
+    # You must inform the recipients where they can get the source for the MPLed code
+    # in the executable program .. you are distributing (i.e...  comply with Section 3.2).
+    "MPL-2.0",
+    #"Apache-2.0 WITH LLVM-exception",
+]
+# List of explicitly disallowed licenses
+# See https://spdx.org/licenses/ for list of possible licenses
+# [possible values: any SPDX 3.11 short identifier (+ optional exception)].
+deny = [
+    #"Nokia",
+]
+# Lint level for licenses considered copyleft
+copyleft = "warn"
+# Blanket approval or denial for OSI-approved or FSF Free/Libre licenses
+# * both - The license will be approved if it is both OSI-approved *AND* FSF
+# * either - The license will be approved if it is either OSI-approved *OR* FSF
+# * osi-only - The license will be approved if is OSI-approved *AND NOT* FSF
+# * fsf-only - The license will be approved if is FSF *AND NOT* OSI-approved
+# * neither - This predicate is ignored and the default lint level is used
+allow-osi-fsf-free = "neither"
+# Lint level used when no other predicates are matched
+# 1. License isn't in the allow or deny lists
+# 2. License isn't copyleft
+# 3. License isn't OSI/FSF, or allow-osi-fsf-free = "neither"
+default = "deny"
+# The confidence threshold for detecting a license from license text.
+# The higher the value, the more closely the license text must be to the
+# canonical license text of a valid SPDX license file.
+# [possible values: any between 0.0 and 1.0].
+confidence-threshold = 0.8
+# Allow 1 or more licenses on a per-crate basis, so that particular licenses
+# aren't accepted for every possible crate as with the normal allow list
+exceptions = [
+    # OpenSSL was / is now Apache License v2.0 (ASL v2)
+    # ring borrowed from old license via BoringSSL ?
+    #
+    # This is what radicle-link deny.toml says:
+    # Technically, the `ring` crate is "ISC AND MIT AND OpenSSL", but the rust
+    # code is ISC (mostly). The OpenSSL license is not (?) compatible with GPLv3.
+    # For the sake of sanity, we will need to either get rid of TLS, or
+    # re-license.
+    { allow = ["ISC", "MIT", "OpenSSL"], name = "ring" },
+]
+
+# Some crates don't have (easily) machine readable licensing information,
+# adding a clarification entry for it allows you to manually specify the
+# licensing information
+[[licenses.clarify]]
+name = "ring"
+expression = "ISC AND MIT AND OpenSSL"
+license-files = [{ path = "LICENSE", hash = 0xbd0eed23 }]
+
+# The name of the crate the clarification applies to
+#name = "ring"
+# The optional version constraint for the crate
+#version = "*"
+# The SPDX expression for the license requirements of the crate
+#expression = "MIT AND ISC AND OpenSSL"
+# One or more files in the crate's source used as the "source of truth" for
+# the license expression. If the contents match, the clarification will be used
+# when running the license check, otherwise the clarification will be ignored
+# and the crate will be checked normally, which may produce warnings or errors
+# depending on the rest of your configuration
+#license-files = [
+    # Each entry is a crate relative path, and the (opaque) hash of its contents
+    #{ path = "LICENSE", hash = 0xbd0eed23 }
+#]
+
+[licenses.private]
+# If true, ignores workspace crates that aren't published, or are only
+# published to private registries.
+# To see how to mark a crate as unpublished (to the official registry),
+# visit https://doc.rust-lang.org/cargo/reference/manifest.html#the-publish-field.
+ignore = false
+# One or more private registries that you might publish crates to, if a crate
+# is only published to private registries, and ignore is true, the crate will
+# not have its license(s) checked
+registries = [
+    #"https://sekretz.com/registry
+]
+
+# This section is considered when running `cargo deny check bans`.
+# More documentation about the 'bans' section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/bans/cfg.html
+[bans]
+# Lint level for when multiple versions of the same crate are detected
+multiple-versions = "warn"
+# Lint level for when a crate version requirement is `*`
+wildcards = "allow"
+# The graph highlighting used when creating dotgraphs for crates
+# with multiple versions
+# * lowest-version - The path to the lowest versioned duplicate is highlighted
+# * simplest-path - The path to the version with the fewest edges is highlighted
+# * all - Both lowest-version and simplest-path are used
+highlight = "all"
+# List of crates that are allowed. Use with care!
+allow = [
+    #{ name = "ansi_term", version = "=0.11.0" },
+]
+# List of crates to deny
+deny = [
+    # Each entry the name of a crate and a version range. If version is
+    # not specified, all versions will be matched.
+    #{ name = "ansi_term", version = "=0.11.0" },
+    #
+    # Wrapper crates can optionally be specified to allow the crate when it
+    # is a direct dependency of the otherwise banned crate
+    #{ name = "ansi_term", version = "=0.11.0", wrappers = [] },
+]
+# Certain crates/versions that will be skipped when doing duplicate detection.
+skip = [
+    #{ name = "ansi_term", version = "=0.11.0" },
+]
+# Similarly to `skip` allows you to skip certain crates during duplicate
+# detection. Unlike skip, it also includes the entire tree of transitive
+# dependencies starting at the specified crate, up to a certain depth, which is
+# by default infinite
+skip-tree = [
+    #{ name = "ansi_term", version = "=0.11.0", depth = 20 },
+]
+
+# This section is considered when running `cargo deny check sources`.
+# More documentation about the 'sources' section can be found here:
+# https://embarkstudios.github.io/cargo-deny/checks/sources/cfg.html
+[sources]
+# Lint level for what to happen when a crate from a crate registry that is not
+# in the allow list is encountered
+unknown-registry = "warn"
+# Lint level for what to happen when a crate from a git repository that is not
+# in the allow list is encountered
+unknown-git = "warn"
+# List of URLs for allowed crate registries. Defaults to the crates.io index
+# if not specified. If it is specified but empty, no registries are allowed.
+allow-registry = ["https://github.com/rust-lang/crates.io-index"]
+# List of URLs for allowed Git repositories
+allow-git = []
+
+[sources.allow-org]
+# 1 or more github.com organizations to allow git sources for
+github = [""]
+# 1 or more gitlab.com organizations to allow git sources for
+gitlab = [""]
+# 1 or more bitbucket.org organizations to allow git sources for
+bitbucket = [""]