diff --git a/geotiff.spec b/geotiff.spec
index 05440aa..1be8970 100644
--- a/geotiff.spec
+++ b/geotiff.spec
@@ -45,7 +45,7 @@ Summary:        GeoTIFF header files
 Group:          Development/Libraries/C and C++
 Requires:       %{libname} = %{version}
 Requires:       pkgconfig(libtiff-4)
-Requires:       pkgconfig(proj)
+Requires:       pkgconfig(proj) >= 6.0
 Provides:       lib%{name}-devel = %{version}
 
 %description devel