diff --git a/.github/workflows/build-kotlin.yml b/.github/workflows/build-kotlin.yml
index 02fe0e8..40be914 100644
--- a/.github/workflows/build-kotlin.yml
+++ b/.github/workflows/build-kotlin.yml
@@ -33,7 +33,7 @@ jobs:
           version: "${{ env.PROTOC_VERSION }}"
 
       - name: Rust setup (1.70.0)
-        uses: dtolnay/rust-toolchain@1.70.0
+        uses: dtolnay/rust-toolchain@1.90
         with:
           components: rustfmt, clippy
 
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 8c889e3..03754b4 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -34,7 +34,7 @@ jobs:
 
       # use MSRV
       - name: Set Rust version to MSRV 1.70
-        uses: dtolnay/rust-toolchain@1.70
+        uses: dtolnay/rust-toolchain@1.90
         with:
           # Add armv7, aarch64, i686, x86_64 targets
           targets: armv7-linux-androideabi, aarch64-linux-android, i686-linux-android, x86_64-linux-android