diff --git a/crates/c-api/Cargo.toml b/crates/c-api/Cargo.toml
index 804dd49e..ac0b0306 100644
--- a/crates/c-api/Cargo.toml
+++ b/crates/c-api/Cargo.toml
@@ -5,6 +5,7 @@ authors = ["Yevhenii Reizner <razrfalcon@gmail.com>"]
 keywords = ["svg", "render", "raster", "c-api"]
 license = "MPL-2.0"
 edition = "2021"
+rust-version = "1.67.1"
 workspace = "../.."
 
 [lib]
diff --git a/crates/resvg/Cargo.toml b/crates/resvg/Cargo.toml
index 6ff97860..887edaa0 100644
--- a/crates/resvg/Cargo.toml
+++ b/crates/resvg/Cargo.toml
@@ -5,6 +5,7 @@ authors = ["Yevhenii Reizner <razrfalcon@gmail.com>"]
 keywords = ["svg", "render", "raster"]
 license = "MPL-2.0"
 edition = "2021"
+rust-version = "1.67.1"
 description = "An SVG rendering library."
 repository = "https://github.com/RazrFalcon/resvg"
 exclude = ["tests"]
diff --git a/crates/usvg/Cargo.toml b/crates/usvg/Cargo.toml
index 877ba12c..805da9de 100644
--- a/crates/usvg/Cargo.toml
+++ b/crates/usvg/Cargo.toml
@@ -5,6 +5,7 @@ authors = ["Yevhenii Reizner <razrfalcon@gmail.com>"]
 keywords = ["svg"]
 license = "MPL-2.0"
 edition = "2021"
+rust-version = "1.65.0"
 description = "An SVG simplification library."
 categories = ["multimedia::images"]
 repository = "https://github.com/RazrFalcon/resvg"