diff --git a/Dockerfile b/Dockerfile
index 96b08b9..06e3441 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -22,8 +22,6 @@ RUN --mount=type=cache,target=/go/pkg/mod \
 # Final stage
 FROM gcr.io/distroless/static-debian12:nonroot
 
-ENV GITEA_MODE=stdio
-
 WORKDIR /app
 COPY --from=builder --chown=nonroot:nonroot /app/gitea-mcp .
 
diff --git a/cmd/cmd.go b/cmd/cmd.go
index 29098f1..233bae9 100644
--- a/cmd/cmd.go
+++ b/cmd/cmd.go
@@ -80,8 +80,8 @@ func init() {
 		flagPkg.Token = os.Getenv("GITEA_ACCESS_TOKEN")
 	}
 
-	if os.Getenv("GITEA_MODE") != "" {
-		flagPkg.Mode = os.Getenv("GITEA_MODE")
+	if os.Getenv("MCP_MODE") != "" {
+		flagPkg.Mode = os.Getenv("MCP_MODE")
 	}
 
 	if os.Getenv("GITEA_READONLY") == "true" {