diff --git a/external/anomaly/constraints.txt b/external/anomaly/constraints.txt
index 7de621c04ed..c0038494d44 100644
--- a/external/anomaly/constraints.txt
+++ b/external/anomaly/constraints.txt
@@ -17,3 +17,4 @@ requests==2.26.0
 scikit-image==0.17.2
 scikit-learn==0.24.2
 torchmetrics==0.6.0
+protobuf==3.20.0
diff --git a/external/mmsegmentation/constraints.txt b/external/mmsegmentation/constraints.txt
index e69de29bb2d..f1bc6f8ea15 100644
--- a/external/mmsegmentation/constraints.txt
+++ b/external/mmsegmentation/constraints.txt
@@ -0,0 +1 @@
+protobuf==3.20.0