diff --git a/.cirrus.yml b/.cirrus.yml
index eecb12276f..c41293bb82 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -223,9 +223,9 @@ task:
   env:
     TARGET: x86_64-unknown-redox
     # Redox requires a nightly compiler.
-    # If stuff breaks, change nightly to the date in the toolchain_*
-    # directory at https://static.redox-os.org
-    TOOLCHAIN: nightly-2020-08-04
+    # If stuff breaks, change nightly to the date at
+    # https://gitlab.redox-os.org/redox-os/redox/-/blob/master/rust-toolchain
+    TOOLCHAIN: nightly-2021-06-15
   container:
     image: rustlang/rust:nightly
   setup_script: