diff --git a/Dockerfile b/Dockerfile
index e240985..0c42124 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,7 @@
 # Use fixed foundry image
+ARG FOUNDRY_VERSION=nightly-4a8c7d0e26a1befa526222e22737740f80a7f1c5
 
-FROM ghcr.io/foundry-rs/foundry:nightly-4a8c7d0e26a1befa526222e22737740f80a7f1c5
+FROM ghcr.io/foundry-rs/foundry:${FOUNDRY_VERSION}
 
 # Copy our source code into the container
 WORKDIR /app