diff --git a/ctools.pc.in b/ctools.pc.in
index 5509e97..1fbd3c3 100644
--- a/ctools.pc.in
+++ b/ctools.pc.in
@@ -8,7 +8,7 @@ Description: CTA science analysis tools
 URL: http://cta.irap.omp.eu/ctools
 Version: 0.6.0
 Requires: 
-Requires.private: GammaLib >= 0.6.2
+Requires.private: GammaLib >= 0.7.0
 Conflicts: 
 Cflags: -I${includedir}/ctools
 Libs: -L${libdir} -lctools