diff --git a/build.rs b/build.rs
index a897757a..86681d95 100644
--- a/build.rs
+++ b/build.rs
@@ -3,9 +3,9 @@ use rustc_version::{version, Version};
 
 fn main() {
     let version = version().expect("Failed to get rustc version.");
-    if version < Version::parse("1.43.0").unwrap() {
+    if version < Version::parse("1.45.0").unwrap() {
         eprintln!(
-            "\n\nAt least Rust version 1.43 is required.\n\
+            "\n\nAt least Rust version 1.45 is required.\n\
              Version {} is used for building.\n\
              Build aborted.\n\n",
             version