diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fe2a29004..6039c54c9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -43,6 +43,11 @@ jobs:
         if: matrix.msrv
         run: |
           cargo update -p hashlink --precise "0.8.2" --verbose # hashlink 0.8.3 requires hashbrown 0.14, requiring 1.64.0
+          cargo update -p proptest --precise "1.2.0" --verbose # proptest 1.3.0 requires rustc 1.64.0
+          cargo update -p reqwest --precise "0.11.20" --verbose # reqwest 0.11.21 broke 1.63.0 MSRV
+          cargo update -p regex --precise "1.9.6" --verbose # regex 1.10.0 requires rustc 1.65.0
+          cargo update -p jobserver --precise "0.1.26" --verbose # jobserver 0.1.27 requires rustc 1.66.0
+          cargo update -p zstd-sys --precise "2.0.8+zstd.1.5.5" --verbose # zstd-sys 2.0.9+zstd.1.5.5 requires rustc 1.64.0
       - name: Build on Rust ${{ matrix.toolchain }}
         run: cargo build --verbose --color always
       - name: Build with UniFFI support on Rust ${{ matrix.toolchain }}