diff --git a/.github/workflows/msrv.yml b/.github/workflows/msrv.yml
index c9cef992..76847256 100644
--- a/.github/workflows/msrv.yml
+++ b/.github/workflows/msrv.yml
@@ -55,16 +55,16 @@ jobs:
 
       - run: |
           MSRV=$(rustc --version | cut -d\  -f2)
-          sed s/^msrv\ =\ \".*\"/msrv\ =\ \"$MSRV\"/g \
+          sed "s/^msrv\ =\ \".*\"/msrv\ =\ \"${MSRV}\"/g" \
               .clippy.toml >> .clippy.toml.tmp
           mv .clippy.toml.tmp .clippy.toml
-          sed s/^rust-version\ =\ \".*\"/rust-version\ =\ \"$MSRV\"/g \
+          sed "s/^rust-version\ =\ \".*\"/rust-version\ =\ \"${MSRV}\"/g" \
               Cargo.toml >> Cargo.toml.tmp
           mv Cargo.toml.tmp Cargo.toml
-          sed "s/MSRV-.*-green$/MSRV-"$MSRV"-green/g" src/lib.rs >> lib.rs
+          sed "s/MSRV-.*-green$/MSRV-${MSRV}-green/g" src/lib.rs >> lib.rs
           mv lib.rs src/
           git add .clippy.toml Cargo.toml src/lib.rs
-          git commit --allow-empty -m "Changed ::= MSRV:  "$MSRV
+          git commit --allow-empty -m "Changed ::= MSRV:  ${MSRV}"
 
       - uses: peter-evans/create-pull-request@v5.0.1
         with: