diff --git a/Makefile.ship b/Makefile.ship
index d7b972d..5be48ba 100644
--- a/Makefile.ship
+++ b/Makefile.ship
@@ -1054,7 +1054,7 @@ EXT=
 
 # The default calc versions
 #
-VERSION= 2.12.6.5
+VERSION= 2.12.6.6
 
 # Names of shared libraries with versions
 #
diff --git a/custom/Makefile b/custom/Makefile
index 156b4e0..6102660 100644
--- a/custom/Makefile
+++ b/custom/Makefile
@@ -348,7 +348,7 @@ EXT=
 
 # The default calc versions
 #
-VERSION= 2.12.6.5
+VERSION= 2.12.6.6
 
 # Names of shared libraries with versions
 #
diff --git a/custom/Makefile.head b/custom/Makefile.head
index 4500487..b87ff5f 100644
--- a/custom/Makefile.head
+++ b/custom/Makefile.head
@@ -348,7 +348,7 @@ EXT=
 
 # The default calc versions
 #
-VERSION= 2.12.6.5
+VERSION= 2.12.6.6
 
 # Names of shared libraries with versions
 #
diff --git a/version.c b/version.c
index 90b0ccf..6d81f0b 100644
--- a/version.c
+++ b/version.c
@@ -45,7 +45,7 @@ static char *program;
 #define MAJOR_VER	2	/* major library version */
 #define MINOR_VER	12	/* minor library version */
 #define MAJOR_PATCH	6	/* major software level under library version */
-#define MINOR_PATCH	5	/* minor software level or 0 if not patched */
+#define MINOR_PATCH	6	/* minor software level or 0 if not patched */
 
 
 /*