diff --git a/configure.ac b/configure.ac
index abdf82d..c617b3f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -23,7 +23,7 @@
 # DEALINGS IN THE SOFTWARE.
 
 dnl Process this file with autoconf to produce a configure script
-AC_INIT([Crumble], 0.8.3)
+AC_INIT([Crumble], 0.9.0)
 AC_PREREQ([2.63])  dnl This version introduced 4-argument AC_CHECK_HEADER
 
 AM_INIT_AUTOMAKE
diff --git a/crumble.1 b/crumble.1
index fc3f089..a36b86f 100644
--- a/crumble.1
+++ b/crumble.1
@@ -1,4 +1,4 @@
-.TH crumble 1 "14 March 2018" "crumble-0.8" "Bioinformatics tools"
+.TH crumble 1 "13 April 2022" "crumble-0.9" "Bioinformatics tools"
 .SH NAME
 .PP
 crumble \- Lossy compression of DNA sequence quality values
diff --git a/snp_score.c b/snp_score.c
index fdf7ee3..4ea219e 100644
--- a/snp_score.c
+++ b/snp_score.c
@@ -48,7 +48,7 @@
 
 //#define DEBUG
 
-#define CRUMBLE_VERSION "0.8.3"
+#define CRUMBLE_VERSION "0.9.0"
 
 /*
  * Prunes quality based on snp calling score.