diff --git a/pkgs/development/compilers/rust/1_39_0.nix b/pkgs/development/compilers/rust/1_39_0.nix
deleted file mode 100644
index e86be63bf3a5b..0000000000000
--- a/pkgs/development/compilers/rust/1_39_0.nix
+++ /dev/null
@@ -1,29 +0,0 @@
-# New rust versions should first go to staging.
-# Things to check after updating:
-# 1. Rustc should produce rust binaries on x86_64-linux, aarch64-linux and x86_64-darwin:
-#    i.e. nix-shell -p fd or @GrahamcOfBorg build fd on github
-#    This testing can be also done by other volunteers as part of the pull
-#    request review, in case platforms cannot be covered.
-# 2. The LLVM version used for building should match with rust upstream.
-# 3. Firefox and Thunderbird should still build on x86_64-linux.
-import ./default.nix {
-  rustcVersion = "1.39.0";
-  rustcSha256 = "0mwkc1bnil2cfyf6nglpvbn2y0zfbv44zfhsd5qg4c9rm6vgd8dl";
-
-  # Note: the version MUST be one version prior to the version we're
-  # building
-  bootstrapVersion = "1.38.0";
-
-  # fetch hashes by running `print-hashes.sh 1.38.0`
-  bootstrapHashes = {
-    i686-unknown-linux-gnu = "41aed8a350e24a0cac1444ed99b3dd24a90bc581dd88cb420c6e547d6b5f57af";
-    x86_64-unknown-linux-gnu = "adda26b3f0609dbfbdc2019da4a20101879b9db2134fae322a4e863a069ec221";
-    arm-unknown-linux-gnueabihf = "0603a3d3d16ae8f3b3b117eb699e8f3ef7532a6f6d3c29d13e7d4614fc3c9e7a";
-    armv7-unknown-linux-gnueabihf = "8b1bf1680a61a643d6b5c7a3b1a1ce88448652756395e20ba5846739cbd085c4";
-    aarch64-unknown-linux-gnu = "06afd6d525326cea95c3aa658aaa8542eab26f44235565bb16913ac9d12b7bda";
-    i686-apple-darwin = "cdbf2807774bed350a3af6f41d7f7dd7ceff28777cde310c3ba90033188eb2f8";
-    x86_64-apple-darwin = "bd301b78ddcd5d4553962b115e1dca5436dd3755ed323f86f4485769286a8a5a";
-  };
-
-  selectRustPackage = pkgs: pkgs.rust_1_39_0;
-}
diff --git a/pkgs/development/compilers/rust/1_40_0.nix b/pkgs/development/compilers/rust/1_40_0.nix
new file mode 100644
index 0000000000000..2280605439ff5
--- /dev/null
+++ b/pkgs/development/compilers/rust/1_40_0.nix
@@ -0,0 +1,29 @@
+# New rust versions should first go to staging.
+# Things to check after updating:
+# 1. Rustc should produce rust binaries on x86_64-linux, aarch64-linux and x86_64-darwin:
+#    i.e. nix-shell -p fd or @GrahamcOfBorg build fd on github
+#    This testing can be also done by other volunteers as part of the pull
+#    request review, in case platforms cannot be covered.
+# 2. The LLVM version used for building should match with rust upstream.
+# 3. Firefox and Thunderbird should still build on x86_64-linux.
+import ./default.nix {
+  rustcVersion = "1.40.0";
+  rustcSha256 = "1ba9llwhqm49w7sz3z0gqscj039m53ky9wxzhaj11z6yg1ah15yx";
+
+  # Note: the version MUST be one version prior to the version we're
+  # building
+  bootstrapVersion = "1.39.0";
+
+  # fetch hashes by running `print-hashes.sh 1.39.0`
+  bootstrapHashes = {
+    i686-unknown-linux-gnu = "36e31b3069c5be4b1fe3c8f7588ca787f13f91ab7170d2b24c6b07285816d0e5";
+    x86_64-unknown-linux-gnu = "b10a73e5ba90034fe51f0f02cb78f297ed3880deb7d3738aa09dc5a4d9704a25";
+    arm-unknown-linux-gnueabihf = "ea08d78a718cd34e67733526c70f3be460605dec8284bdeda36e0c6dd6222eca";
+    armv7-unknown-linux-gnueabihf = "41186745a97e6b76fb7a3a049882fb4869b526e98a66c05a133518515037f0d7";
+    aarch64-unknown-linux-gnu = "e27dc8112fe577012bd88f30e7c92dffd8c796478ce386c49465c03b6db8209f";
+    i686-apple-darwin = "0ada2ed87cc449ed470dce3b57b15bfd5c8c52b01d6116e6b1edc9a3e97836aa";
+    x86_64-apple-darwin = "3736d49c5e9592844e1a5d5452883aeaf8f1e25d671c1bc8f01e81c1766603b5";
+  };
+
+  selectRustPackage = pkgs: pkgs.rust_1_40_0;
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 501bfc9581cbc..ca1d64713ebcf 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8644,17 +8644,17 @@ in
     inherit (darwin) apple_sdk;
   };
 
-  rust_1_39_0 = callPackage ../development/compilers/rust/1_39_0.nix {
+  rust_1_40_0 = callPackage ../development/compilers/rust/1_40_0.nix {
     inherit (darwin.apple_sdk.frameworks) CoreFoundation Security;
   };
   rust_1_38_0 = callPackage ../development/compilers/rust/1_38_0.nix {
     inherit (darwin.apple_sdk.frameworks) CoreFoundation Security;
   };
-  rust = rust_1_39_0;
+  rust = rust_1_40_0;
 
-  rustPackages_1_39_0 = rust_1_39_0.packages.stable;
+  rustPackages_1_40_0 = rust_1_40_0.packages.stable;
   rustPackages_1_38_0 = rust_1_38_0.packages.stable;
-  rustPackages = rustPackages_1_39_0;
+  rustPackages = rustPackages_1_40_0;
 
   inherit (rustPackages) cargo rustc rustPlatform;
   inherit (rust) makeRustPlatform;