diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 466aa5a..6a86794 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -19,7 +19,7 @@ jobs:
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.65.0
+          toolchain: 1.70.0
           override: true
           components: rustfmt
       - run: cargo fmt -- --check
@@ -58,7 +58,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.65.0
+          toolchain: 1.70.0
           override: true
 
       - name: Build static geos crate
@@ -76,7 +76,7 @@ jobs:
       fail-fast: false
       matrix:
         toolchain:
-          - 1.65.0
+          - 1.70.0
           - nightly
         geos: ["3.6.5", "3.7.5", "3.8.3", "3.9.3", "3.10.3", "3.11.0"]
         include: