diff --git a/Cargo.toml b/Cargo.toml
index e81f834..55b42ab 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,7 +2,7 @@
 name = "build-rs"
 version = "0.2.0"
 edition = "2021"
-rust-version = "1.76"
+rust-version = "1.78"
 publish = false
 
 [dependencies]
diff --git a/test-lib/Cargo.toml b/test-lib/Cargo.toml
index 551c482..0261e63 100644
--- a/test-lib/Cargo.toml
+++ b/test-lib/Cargo.toml
@@ -2,7 +2,7 @@
 name = "build-rs-test-lib"
 version = "0.2.0"
 edition = "2021"
-rust-version = "1.76"
+rust-version = "1.78"
 publish = false
 
 [features]