diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index a7042f5..5e69670 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -16,7 +16,7 @@ jobs:
           - stable
           - beta
           - nightly
-          - 1.32.0
+          - 1.45.0
     steps:
       - name: Checkout sources
         uses: actions/checkout@v2
diff --git a/README.md b/README.md
index f447afb..9eb9a3e 100644
--- a/README.md
+++ b/README.md
@@ -30,4 +30,4 @@ extern crate bitflags;
 
 ## Rust Version Support
 
-The minimum supported Rust version is 1.20 due to use of associated constants.
+The minimum supported Rust version is 1.45 due to use of associated constants and const functions.