diff --git a/Cargo.toml b/Cargo.toml
index 27a7e3112..ba0943f15 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -53,9 +53,10 @@ features = ["discord-full"]
 optional = true
 version = "0.4"
 
+# Temporary hack to pin MSRV.
 [dependencies.flume]
 optional = true
-version = "0.10"
+version = "<0.10.12"
 
 [dependencies.futures]
 version = "0.3"