diff --git a/Dockerfile b/Dockerfile
index 8dbb746..671f05d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -26,6 +26,11 @@ COPY . .
 # Remove local dev replaces that don't exist in container context
 RUN go mod edit -dropreplace gitea.maximumdirect.net/ejr/feedkit
 
+# Ensure go.sum is complete after dropping the replace
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    go mod tidy
+
 # Default to a static build (no CGO)
 # If errors, can build with: --build-arg CGO_ENABLED=1
 ARG CGO_ENABLED=0