diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 35d4a6e9..5312ab85 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macOS-latest, windows-latest]
-        rust: [stable, 1.59.0]
+        rust: [stable, 1.66.0]
 
     steps:
     - uses: actions/checkout@master
diff --git a/README.md b/README.md
index 9a8c8927..65938642 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ All of these are enabled by default.
 MSRV
 ----
 
-Our current Minimum Supported Rust Version is **1.59.0**. When adding features,
+Our current Minimum Supported Rust Version is **1.66.0**. When adding features,
 we will follow these guidelines:
 
 - We will always support the latest four minor Rust versions. This gives you a 6