diff --git a/Cargo.toml b/Cargo.toml
index 2d4de55f..d9c018d2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ edition = "2021"
 autoexamples = false
 
 # also update in README.md (badge and "Rust version requirements" section)
-rust-version = "1.56"
+rust-version = "1.65.0"
 
 include = [
   "CHANGELOG.md",