Index: diffus/Cargo.toml
===================================================================
--- diffus.orig/Cargo.toml
+++ diffus/Cargo.toml
@@ -32,10 +32,6 @@ path = "src/lib.rs"
 version = "=0.10.0"
 optional = true
 
-[dependencies.indexmap]
-version = "2"
-optional = true
-
 [dependencies.itertools]
 version = ">=0.10,<0.15"
 
@@ -51,6 +47,5 @@ optional = true
 [features]
 default = []
 derive = ["diffus-derive"]
-indexmap-impl = ["indexmap"]
-serialize-impl = ["diffus-derive/serialize-impl", "serde", "indexmap/serde-1", "uuid/serde"]
+serialize-impl = ["diffus-derive/serialize-impl", "serde", "uuid/serde"]
 uuid-impl = ["uuid"]
