diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e74c813ffa3a..d98ccdf29fd8 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -117,7 +117,7 @@ jobs:
         include:
         - name: Linux x86_64 stable
           os: ubuntu-latest
-          rust: stable
+          rust: 1.75.0
           other: i686-unknown-linux-gnu
 #        - name: Linux x86_64 beta
 #          os: ubuntu-latest
@@ -129,7 +129,7 @@ jobs:
 #          other: i686-unknown-linux-gnu
         - name: macOS x86_64 stable
           os: macos-latest
-          rust: stable
+          rust: 1.75.0
           other: x86_64-apple-ios
 #        - name: macOS x86_64 nightly
 #          os: macos-latest
@@ -137,7 +137,7 @@ jobs:
 #          other: x86_64-apple-ios
         - name: Windows x86_64 MSVC stable
           os: windows-latest
-          rust: stable-msvc
+          rust: 1.75.0-msvc
           other: i686-pc-windows-msvc
 #        - name: Windows x86_64 gnu nightly # runs out of space while trying to link the test suite
 #          os: windows-latest