diff --git a/asio.spec b/asio.spec
index 8b83488..d959557 100644
--- a/asio.spec
+++ b/asio.spec
@@ -25,8 +25,8 @@ modern C++ approach.
 
 %package devel
 Summary:        Header files for asio
-Requires:       openssl-devel
-Requires:       boost-devel
+Recommends:     openssl-devel
+Recommends:     boost-devel
 
 %description devel
 Header files you can use to develop applications with asio.