diff --git a/ctools.pc.in b/ctools.pc.in
index 340a402..f7e9bc5 100644
--- a/ctools.pc.in
+++ b/ctools.pc.in
@@ -6,9 +6,9 @@ includedir=${prefix}/include
 Name: ctools
 Description: CTA science analysis tools
 URL: http://cta.irap.omp.eu/ctools
-Version: 1.1.0
+Version: 1.1.0.dev1
 Requires: 
-Requires.private: gammalib >= 1.1.0
+Requires.private: gammalib >= 1.1.0.dev1
 Conflicts: 
 Cflags: -I${includedir}/ctools @OPENMP_CXXFLAGS@
 Libs: -L${libdir} -lctools