diff --git a/.github/bors.toml b/.github/bors.toml
index e66af99f..3fd86864 100644
--- a/.github/bors.toml
+++ b/.github/bors.toml
@@ -1,5 +1,5 @@
 status = [
   "Check", "cargo deny", "pre-commit", "Rustfmt", "Clippy", "Test with minimal versions",
-  "Test suite (stable)", "Test suite (beta)", "Test suite (nightly)", "Test suite (1.70.0)"
+  "Test suite (stable)", "Test suite (beta)", "Test suite (nightly)", "Test suite (1.65.0)"
 ]
 delete_merged_branches = true
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index b5eebf84..d69a1e69 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -36,7 +36,7 @@ jobs:
     needs: check
     strategy:
       matrix:
-        toolchain: [stable, beta, nightly, 1.70.0]
+        toolchain: [stable, beta, nightly, 1.65.0]
       fail-fast: false
     steps:
       - uses: actions/checkout@v3
diff --git a/Cargo.toml b/Cargo.toml
index dd48ffbc..72b07154 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ authors = ["Samuel Tardieu <sam@rfc1149.net>"]
 categories = ["algorithms"]
 readme = "README.md"
 edition = "2021"
-rust-version = "1.70.0"
+rust-version = "1.65.0"
 
 [package.metadata.release]
 sign-commit = true
diff --git a/README.md b/README.md
index e7872865..74b9fce4 100644
--- a/README.md
+++ b/README.md
@@ -89,7 +89,7 @@ floating-point types (such as `f32`) that implement `PartialOrd`
 in this context, you can wrap them into compliant types using the
 [ordered-float](https://crates.io/crates/ordered-float) crate.
 
-The minimum supported Rust version (MSRV) is Rust 1.70.0.
+The minimum supported Rust version (MSRV) is Rust 1.65.0.
 
 ## License
 
diff --git a/tests/ui.rs b/tests/ui.rs
index 5b2c1272..2b87c108 100644
--- a/tests/ui.rs
+++ b/tests/ui.rs
@@ -1,7 +1,7 @@
 #[test]
 fn ui() {
     match std::env::var("TOOLCHAIN").as_deref() {
-        Ok("stable") | Ok("1.70.0") => (),
+        Ok("stable") | Ok("1.65.0") => (),
         _ => {
             let t = trybuild::TestCases::new();
             t.compile_fail("tests/ui/*.rs");