diff --git a/ruma/Cargo.toml b/ruma/Cargo.toml
index 392a8c34..54f49f16 100644
--- a/ruma/Cargo.toml
+++ b/ruma/Cargo.toml
@@ -22,7 +22,7 @@ ruma-common = { version = "0.1.3", path = "../ruma-common" }
 ruma-identifiers = "0.16.2"
 
 ruma-events = { version = "0.21.3", optional = true }
-ruma-signatures = { version = "0.5.0", path = "../ruma-signatures", optional = true }
+ruma-signatures = { version = "0.6.0-dev.1", path = "../ruma-signatures", optional = true }
 
 ruma-api = { version = "0.16.1", optional = true }
 ruma-appservice-api = { version = "0.1.0", path = "../ruma-appservice-api", optional = true }