diff --git a/debian/changelog b/debian/changelog
index c11f945..b9787a1 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+grc (1.13-1) unstable; urgency=low
+
+  * do not add sh aliases unless explicitely allowed in /etc/default/grc (closes: #984629)
+  * several minor improvements
+
+ -- Radovan Garabík <garabik@kassiopeia.juls.savba.sk>  Mon, 26 Jul 2021 18:08:34 +0200
+
 grc (1.12-1) unstable; urgency=low
 
   * add new configurations
diff --git a/debian/grc.default b/debian/grc.default
index b987641..984ba29 100644
--- a/debian/grc.default
+++ b/debian/grc.default
@@ -2,6 +2,7 @@
 # true or false
 #
 # since this is rather invasive, it defaults to false
+#
 # changing it makes your shell source /etc/profile.d/grc
 
 GRC_ALIASES=false
diff --git a/grc b/grc
index c59d5f6..4b6848b 100755
--- a/grc
+++ b/grc
@@ -6,11 +6,11 @@ import os, re, string, sys, getopt, signal
 
 
 def version():
-    print ("Generic Colouriser 1.12")
+    print ("Generic Colouriser 1.13")
     sys.exit()
 
 def help():
-    print("""Generic Colouriser 1.12
+    print("""Generic Colouriser 1.13
 grc [options] command [args]
 Options:
 -e --stderr    redirect stderr. If this option is selected,
diff --git a/grc.sh b/grc.sh
index 231b46e..efa4d17 100644
--- a/grc.sh
+++ b/grc.sh
@@ -1,5 +1,9 @@
 # aliases for grc(1)
 
+# this will execute only if there is a line with
+# GRC_ALIASES=true
+# in /etc/default/grc
+
 [ -f /etc/default/grc ] && . /etc/default/grc
 
 [ x$GRC_ALIASES = xtrue ] || return 0