diff --git a/.gitignore b/.gitignore
index f6ed9da..fbaf1be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /futures-0.1.17.crate
 /futures-0.1.18.crate
 /futures-0.1.19.crate
+/futures-0.1.21.crate
diff --git a/rust-futures.spec b/rust-futures.spec
index 1bb08d3..b42bbb1 100644
--- a/rust-futures.spec
+++ b/rust-futures.spec
@@ -5,7 +5,7 @@
 %global crate futures
 
 Name:           rust-%{crate}
-Version:        0.1.19
+Version:        0.1.21
 Release:        1%{?dist}
 Summary:        Implementation of futures and streams featuring zero allocations
 
@@ -53,6 +53,9 @@ which use %{crate} from crates.io.
 %exclude %{cargo_registry}/%{crate}-%{version}/appveyor.yml
 
 %changelog
+* Tue Apr 03 2018 Josh Stone <jistone@redhat.com> - 0.1.21-1
+- Update to 0.1.21
+
 * Fri Mar 23 2018 Josh Stone <jistone@redhat.com> - 0.1.19-1
 - Update to 0.1.19
 
diff --git a/sources b/sources
index 3dbeb0a..5d3205e 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (futures-0.1.19.crate) = fc624ca3f9e18708e5ab4030d0fd3490a6a2b68a84728c2038c1645db4c362e3bd62cbea355672fdbb629e0336aa9cb37eaf88fb2c14423afeecd0ba9eed888a
+SHA512 (futures-0.1.21.crate) = b6079674974489fc325182404896ddd6c2fb3a3a230d0a5ebb611a418a404378442550c92c9895aad9742a6d305a90f3099c9d6ca5bdce55ed1dab2b3e01e755