diff --git a/platform/Dockerfile b/platform/Dockerfile
index d5789b41..f2bb0ef9 100644
--- a/platform/Dockerfile
+++ b/platform/Dockerfile
@@ -5,6 +5,8 @@
 
 FROM golang:1.25-alpine AS builder
 WORKDIR /app
+# Plugin source for replace directive in go.mod
+COPY molecule-ai-plugin-github-app-auth/ /plugin/
 COPY platform/go.mod platform/go.sum ./
 RUN go mod download
 COPY platform/ .
diff --git a/platform/go.mod b/platform/go.mod
index 40a93c6c..a3614168 100644
--- a/platform/go.mod
+++ b/platform/go.mod
@@ -90,3 +90,5 @@ require (
 	google.golang.org/protobuf v1.34.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
+
+replace github.com/Molecule-AI/molecule-ai-plugin-github-app-auth => /plugin