diff --git a/Cargo.toml b/Cargo.toml
index a784d1a3..13387700 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,4 +1,5 @@
 [workspace]
+resolver = "1"
 members = [
     "phf",
     "phf/examples/unicase-example",
diff --git a/phf_shared/Cargo.toml b/phf_shared/Cargo.toml
index b88bd763..9606691a 100644
--- a/phf_shared/Cargo.toml
+++ b/phf_shared/Cargo.toml
@@ -20,6 +20,6 @@ default = ["std"]
 std = []
 
 [dependencies]
-siphasher = "0.3"
+siphasher = "1.0"
 unicase = { version = "2.4.0", optional = true }
 uncased = { version = "0.9.9", optional = true, default-features = false }