Index: diffus/Cargo.toml
===================================================================
--- diffus.orig/Cargo.toml
+++ diffus/Cargo.toml
@@ -37,7 +37,7 @@ version = "1"
 optional = true
 
 [dependencies.itertools]
-version = "0.10"
+version = ">=0.10,<0.15"
 
 [dependencies.serde]
 version = "1.0"
