diff --git a/REQUIRE b/REQUIRE
index 8592a71..d4fcc5f 100644
--- a/REQUIRE
+++ b/REQUIRE
@@ -1,4 +1,4 @@
 julia 0.5
 RobustPmap
-IterativeSolvers 0.3.0
+IterativeSolvers 0.5.0
 Interpolations
\ No newline at end of file