diff --git a/Cargo.toml b/Cargo.toml
index b932804..c72f18b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,10 +12,10 @@ homepage = "https://github.com/pydantic/speedate/"
 repository = "https://github.com/pydantic/speedate/"
 
 [dependencies]
-strum = { version = "0.25", features = ["derive"] }
-strum_macros = "0.25"
+strum = { version = "0.26", features = ["derive"] }
+strum_macros = "0.26"
 
 [dev-dependencies]
 chrono = "0.4.19"
-iso8601 = "0.4.1"
+iso8601 = "0.6.1"
 paste = "1.0.7"