diff --git a/mcp-server/Dockerfile b/mcp-server/Dockerfile
index 9d2eb83f..cb926710 100644
--- a/mcp-server/Dockerfile
+++ b/mcp-server/Dockerfile
@@ -14,9 +14,8 @@ WORKDIR /app
 # Copy the current directory (which contains the diagrams library source and our server code)
 COPY . /app
 
-# Install the diagrams library from source (current dir) and other requirements
-# We install 'mcp' explicitly as it might not be in the local repo's requirements
-RUN pip install --no-cache-dir . mcp
+# Install dependencies
+RUN pip install --no-cache-dir -r requirements.txt
 
 # Create an output directory for persistence if volume is mounted
 RUN mkdir -p /app/output
diff --git a/mcp-server/requirements.txt b/mcp-server/requirements.txt
index af278fdb..b4f267b2 100644
--- a/mcp-server/requirements.txt
+++ b/mcp-server/requirements.txt
@@ -1,2 +1,3 @@
 mcp
+diagrams
 graphviz