diff --git a/.github/workflows/git-extension.yml b/.github/workflows/git-extension.yml
new file mode 100644
index 0000000..f99ccf8
--- /dev/null
+++ b/.github/workflows/git-extension.yml
@@ -0,0 +1,18 @@
+name: Check requirements.txt git URLs are properly formatted
+
+on: pull_request
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: sed -i '/git\+/ { /\.git$/! s/$/.git/ }' requirements.txt
+      - uses: parkerbxyz/suggest-changes@v2
+        with:
+          comment: 'Please change the following dependencies for consistency.'
+          event: 'REQUEST_CHANGES'
diff --git a/requirements.txt b/requirements.txt
index efcba11..694f6fd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,8 +2,8 @@ duckdb
 geojson
 numpy<2
 pandas
-pygmt_helper @ git+https://github.com/ucgmsim/pygmt_helper
+pygmt_helper @ git+https://github.com/ucgmsim/pygmt_helper.git
 qcore @ git+https://github.com/ucgmsim/qcore.git
-source_modelling @ git+https://github.com/ucgmsim/source_modelling
+source_modelling @ git+https://github.com/ucgmsim/source_modelling.git
 typer
 pytest