diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 000000000..1a218f5e5
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,15 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: ".github/workflows" # Location of package manifests
+    schedule:
+      interval: "monthly"
+    groups:
+      actions:
+        patterns:
+          - "*"
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a7d634fbb..5515edfcd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish.yml@v1
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/publish.yml@924441154cf3053034c6513d5e06c69d262fb9a6  # v1.13.0
     with:
       upload_to_pypi: ${{ (github.event_name == 'release') && (github.event.action == 'released') }}
       targets: |
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index cadbc5376..76a9d1669 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,14 +14,14 @@ on:
 
 jobs:
   crds_contexts:
-    uses: spacetelescope/crds/.github/workflows/contexts.yml@master
+    uses: spacetelescope/crds/.github/workflows/contexts.yml@d96060f99a7ca75969f6652b050243592f4ebaeb  # 12.0.0
   check:
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v1
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@924441154cf3053034c6513d5e06c69d262fb9a6  # v1.13.0
     with:
       envs: |
         - linux: check-style
   test:
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v1
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@924441154cf3053034c6513d5e06c69d262fb9a6  # v1.13.0
     needs: [ crds_contexts ]
     with:
       setenv: |
diff --git a/.github/workflows/ci_cron.yml b/.github/workflows/ci_cron.yml
index 88de90391..e3f7fd1b4 100644
--- a/.github/workflows/ci_cron.yml
+++ b/.github/workflows/ci_cron.yml
@@ -8,9 +8,9 @@ on:
 
 jobs:
   crds_contexts:
-    uses: spacetelescope/crds/.github/workflows/contexts.yml@master
+    uses: spacetelescope/crds/.github/workflows/contexts.yml@d96060f99a7ca75969f6652b050243592f4ebaeb  # 12.0.0
   test:
-    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@v1
+    uses: OpenAstronomy/github-actions-workflows/.github/workflows/tox.yml@924441154cf3053034c6513d5e06c69d262fb9a6  # v1.13.0
     needs: [ crds_contexts ]
     with:
       setenv: |