diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b21e6f6..ea639fd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -34,6 +34,10 @@ jobs:
           toolchain: ${{ matrix.toolchain }}
           components: rustfmt, clippy
 
+      - name: Pin crates to versions for MSRV
+        run: |
+          [[ ${{ matrix.toolchain }} != 1.72.0 ]] || (cargo update -p boring --precise 4.13.0 && cargo update -p litemap --precise 0.7.4 && cargo update -p zerofrom --precise 0.1.5)
+      
       - name: Run cargo fmt
         run: cargo fmt --all -- --check