diff --git a/configure.ac b/configure.ac
index fe07f79..a07e6e5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,7 +7,7 @@ AC_PREREQ([2.68])
 
 
 # Initialize package
-AC_INIT([fmt], [1.3], [fmt@guillermo.in], [fmt], [https://github.com/guillermocalvo/fmt/])
+AC_INIT([fmt], [1.3.1], [fmt@guillermo.in], [fmt], [https://github.com/guillermocalvo/fmt/])
 
 
 # Information on the package
diff --git a/package.json b/package.json
index 3ee6ff9..727f520 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name":           "fmt",
-  "version":        "1.3",
+  "version":        "1.3.1",
   "description":    "A tiny C string formatting library",
   "repo":           "guillermocalvo/fmt",
   "license":        "LGPL",
diff --git a/src/fmt.c b/src/fmt.c
index 61d48a4..841bc33 100644
--- a/src/fmt.c
+++ b/src/fmt.c
@@ -4,7 +4,7 @@
  *
  * fmt source code file
  *
- * @version     1.3
+ * @version     1.3.1
  * @author      Copyright (c) 2017 Guillermo Calvo
  *
  */
diff --git a/src/fmt.h b/src/fmt.h
index 9aad813..32f4a04 100644
--- a/src/fmt.h
+++ b/src/fmt.h
@@ -4,7 +4,7 @@
  *
  * fmt header file
  *
- * @version     1.3
+ * @version     1.3.1
  * @author      Copyright (c) 2017 Guillermo Calvo
  *
  */