diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 98cbdf5..1a15f3a 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -2,5 +2,5 @@
 # developers and test environments.  The intent is to keep this updated as new
 # stable versions are released.
 [toolchain]
-channel = "1.90.0"
+channel = "1.91.0"
 profile = "default"