diff --git a/futures-core/Cargo.toml b/futures-core/Cargo.toml
index 9770f7eb6..5440b85b5 100644
--- a/futures-core/Cargo.toml
+++ b/futures-core/Cargo.toml
@@ -21,7 +21,7 @@ unstable = []
 cfg-target-has-atomic = []
 
 [dependencies]
-portable-atomic = { version = "0.3.15", default-features = false, optional = true }
+portable-atomic = { version = "1", default-features = false, optional = true }
 
 [dev-dependencies]
 futures = { path = "../futures" }