diff --git a/kwin6.spec b/kwin6.spec
index e7ed80f..8f359f2 100644
--- a/kwin6.spec
+++ b/kwin6.spec
@@ -142,6 +142,7 @@ Recommends:     hwdata
 Recommends:     xorg-x11-server-wayland
 Provides:       kwin5 = %{version}
 Obsoletes:      kwin5 < %{version}
+Obsoletes:      kwin5-lang < %{version}
 # /usr/share/kwin/tabbox/thumbnail_grid/metadata.json conflicts with plasma5-addons
 Conflicts:      plasma5-addons
 Conflicts:      plasma5-addons-lang
@@ -175,7 +176,6 @@ Summary:        KDE Window Manager - development files
 Requires:       libkwin6 = %{version}
 Requires:       kdecoration6-devel >= %{_plasma6_bugfix}
 Requires:       pkgconfig(epoxy)
-Conflicts:      kdebase4-workspace-devel
 Provides:       kwin5-devel = %{version}
 Obsoletes:      kwin5-devel < %{version}