diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4134f41..b3b8e75 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,12 +20,6 @@ jobs:
           command: clippy
           args: --workspace --tests --examples --features=std -- -D warnings
 
-      - name: cargo doc
-        uses: actions-rs/cargo@v1
-        with:
-          command: doc
-          args: --workspace --features=std
-
       # don't forget the no_std example!
       - name: cargo clippy (example_no_std)
         uses: actions-rs/cargo@v1
@@ -43,6 +37,11 @@ jobs:
         run: ./example_no_std/dump_asm.sh
         shell: bash
 
+      - name: cargo doc
+        run: cargo doc --workspace --features=std
+        env:
+          RUSTDOCFLAGS: "-Dwarnings"
+
   rustfmt:
     name: rustfmt (nightly)
     runs-on: ubuntu-latest