diff --git a/CHANGELOG.md b/CHANGELOG.md
index d916897..088fa97 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# v3.1.1
+- Build system portability fixes
+- Fix `make check` exit code
+
 # v3.1.0
 - Add a `--max-depth` flag to limit recursion depth. For example,
   `libtree --max-depth 1 <file>` will show the resolved paths of direct dependencies
diff --git a/libtree.c b/libtree.c
index 1df28c8..e0d0133 100644
--- a/libtree.c
+++ b/libtree.c
@@ -10,7 +10,7 @@
 #include <sys/utsname.h>
 #include <unistd.h>
 
-#define VERSION "3.1.1-dev"
+#define VERSION "3.1.1"
 
 #define ET_EXEC 2
 #define ET_DYN 3