diff --git a/Cargo.toml b/Cargo.toml
index 913ee7a0..9f9f2903 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,8 +11,8 @@ repository = "https://github.com/ruma/ruma-events"
 version = "0.10.0"
 
 [dependencies]
-ruma-identifiers = "0.11"
-ruma-signatures = "0.4"
-serde = "1.0"
-serde_derive = "1.0"
-serde_json = "1.0"
+ruma-identifiers = "0.11.0"
+ruma-signatures = "0.4.1"
+serde = "1.0.80"
+serde_derive = "1.0.80"
+serde_json = "1.0.33"