diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 306e457..9c92245 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        rust_version: [nightly, 1.72.0]
+        rust_version: nightly
 
     steps:
       - uses: actions/checkout@v3
@@ -39,7 +39,7 @@ jobs:
 
     strategy:
       matrix:
-        rust_version: [nightly, 1.72.0]
+        rust_version: nightly
 
     steps:
       - uses: actions/checkout@v3
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 666d0cd..d710003 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -27,7 +27,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        rust_version: [nightly, 1.72.0]
+        rust_version: nightly
         # https://doc.rust-lang.org/rustc/platform-support.html
         include:
           - host: linux