diff --git a/Dockerfile b/Dockerfile
index 2863afd..5d6da3e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,13 +7,17 @@ RUN GO111MODULE=on
 
 RUN mkdir /app
 
-COPY . /app/insights-bot
-
 WORKDIR /app/insights-bot
 
+COPY go.mod /app/insights-bot/go.mod
+COPY go.sum /app/insights-bot/go.sum
+
 RUN go env
 RUN go env -w CGO_ENABLED=0
 RUN go mod download
+
+COPY . /app/insights-bot
+
 RUN go build -a -o "release/insights-bot" "github.com/nekomeowww/insights-bot/cmd/insights-bot"
 
 # --- runner ---