diff --git a/.github/workflows/benches.yml b/.github/workflows/benches.yml
index 24924d043d..15f4f94f22 100644
--- a/.github/workflows/benches.yml
+++ b/.github/workflows/benches.yml
@@ -7,7 +7,7 @@ on:
 
 env:
   OCAML_VERSION: "4.14.0"
-  RUST_TOOLCHAIN_VERSION: "1.71"
+  RUST_TOOLCHAIN_VERSION: "1.74"
 
 jobs:
   bench:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 09b91f2ab9..25cbfd9848 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust_toolchain_version: ["1.72"]
+        rust_toolchain_version: ["1.74"]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -73,7 +73,7 @@ jobs:
       RUST_TOOLCHAIN_COVERAGE_VERSION: "1.74"
     strategy:
       matrix:
-        rust_toolchain_version: ["1.71", "1.72", "1.73", "1.74"]
+        rust_toolchain_version: ["1.72", "1.73", "1.74"]
         # FIXME: currently not available for 5.0.0.
         # It might be related to boxroot dependency, and we would need to bump
         # up the ocaml-rs dependency
diff --git a/.github/workflows/gh-page.yml b/.github/workflows/gh-page.yml
index 6e9b3386b9..af3c3f18d3 100644
--- a/.github/workflows/gh-page.yml
+++ b/.github/workflows/gh-page.yml
@@ -8,7 +8,7 @@ env:
   OCAML_VERSION: "4.14.0"
   # This version has been chosen randomly. It seems that with 2023-11-16, it is
   # broken. The compiler crashes. Feel free to pick any newer working version.
-  RUST_TOOLCHAIN_VERSION: "1.72"
+  RUST_TOOLCHAIN_VERSION: "1.74"
 
 jobs:
   release:
diff --git a/rust-toolchain b/rust-toolchain
deleted file mode 100644
index cc31fcd4f5..0000000000
--- a/rust-toolchain
+++ /dev/null
@@ -1 +0,0 @@
-1.72
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
new file mode 100644
index 0000000000..76d889104f
--- /dev/null
+++ b/rust-toolchain.toml
@@ -0,0 +1,3 @@
+[toolchain]
+channel = "1.74"
+