diff --git a/asio.spec b/asio.spec
index 6ab432f..86b4253 100644
--- a/asio.spec
+++ b/asio.spec
@@ -29,11 +29,11 @@ modern C++ approach.
 
 %package devel
 Summary:        Header files for asio
-Recommends:     openssl-devel
+Requires:     openssl-devel
 %if 0%{?fedora} >= 41 || 0%{?rhel} >= 11
-Recommends:     openssl-devel-engine
+Requires:       openssl-devel-engine
 %endif
-Recommends:     boost-devel
+Requires:     boost-devel
 
 %description devel
 Header files you can use to develop applications with asio.