diff --git a/crates/ruma-events/Cargo.toml b/crates/ruma-events/Cargo.toml
index 2e94c93e..2c78efd6 100644
--- a/crates/ruma-events/Cargo.toml
+++ b/crates/ruma-events/Cargo.toml
@@ -16,7 +16,7 @@ criterion = { version = "0.3.3", optional = true }
 js_int = { version = "0.2.0", features = ["serde"] }
 ruma-common = { version = "0.5.0", path = "../ruma-common" }
 ruma-events-macros = { version = "=0.22.0-alpha.3", path = "../ruma-events-macros" }
-ruma-identifiers = { version = "0.19.0", path = "../ruma-identifiers" }
+ruma-identifiers = { version = "0.19.0", path = "../ruma-identifiers", features = ["serde"] }
 ruma-serde = { version = "0.3.1", path = "../ruma-serde" }
 serde = { version = "1.0.118", features = ["derive"] }
 serde_json = { version = "1.0.60", features = ["raw_value"] }