diff --git a/requirements.txt b/requirements.txt
index 4896a836..11aaf069 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,4 +9,4 @@ attrs
 systemd-python
 jsonschema
 pyudev
--e git+https://github.com/CanonicalLtd/probert#egg=probert
+-e git+https://github.com/CanonicalLtd/probert@670c7258014eef13a971be0bf12206d96f2829f3#egg=probert
diff --git a/snapcraft.yaml b/snapcraft.yaml
index aaed7774..153c5eab 100644
--- a/snapcraft.yaml
+++ b/snapcraft.yaml
@@ -84,4 +84,5 @@ parts:
     stage-packages: [libc6, libnl-3-dev, libnl-genl-3-dev, libnl-route-3-dev]
     source: https://github.com/CanonicalLtd/probert.git
     source-type: git
+    source-commit: 670c7258014eef13a971be0bf12206d96f2829f3
     requirements: requirements.txt