diff --git a/configure.ac b/configure.ac
index d66a9a1..63687d7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -8,7 +8,7 @@
 
 AC_PREREQ(2.61)
 
-AC_INIT([libgpiod], 1.5.1)
+AC_INIT([libgpiod], 1.5.2)
 AC_SUBST(EXTRA_VERSION, [])
 
 AC_DEFINE_UNQUOTED([GPIOD_VERSION_STR],
@@ -30,7 +30,7 @@
 #
 # Define the libtool version as (C.R.A):
 # NOTE: this version only applies to the core C library.
-AC_SUBST(ABI_VERSION, [4.1.2])
+AC_SUBST(ABI_VERSION, [4.2.2])
 # Have a separate ABI version for C++ bindings:
 AC_SUBST(ABI_CXX_VERSION, [2.0.1])