diff --git a/src/libguac/Makefile.am b/src/libguac/Makefile.am
index 93b15321..cb5f73a4 100644
--- a/src/libguac/Makefile.am
+++ b/src/libguac/Makefile.am
@@ -137,7 +137,7 @@ libguac_la_CFLAGS = \
     -Werror -Wall -pedantic
 
 libguac_la_LDFLAGS =     \
-    -version-info 20:0:0 \
+    -version-info 21:0:0 \
     -no-undefined        \
     @CAIRO_LIBS@         \
     @DL_LIBS@            \