diff --git a/.gitignore b/.gitignore
index a145245..271cf1f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /gflags-2.1.1.tar.gz
 /gflags-2.1.2.tar.gz
+/gflags-2.2.1.tar.gz
diff --git a/sources b/sources
index 439a11c..0c56c0c 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-ac432de923f9de1e9780b5254884599f  gflags-2.1.2.tar.gz
+SHA512 (gflags-2.2.1.tar.gz) = e919cbdcff1f993ddbfa9c06d8e595566a4717c27ff62f388a64c0e6b4683a93211c24ce78485eae84c2c76053341574064e6c56af185fc2782e2816b26e1fc9