diff --git a/configure.ac b/configure.ac
index e52fc8fc..0f460566 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,6 +1,6 @@
 # Process this file with autoconf to produce a configure script.
 
-AC_PREREQ([2.69])
+AC_PREREQ([2.72])
 AC_INIT([profanity],[0.15.0],[jubalh@iodoru.org],[profanity],[https://profanity-im.github.io/])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
@@ -95,7 +95,7 @@ PKG_CHECK_MODULES([curl], [libcurl >= 7.62.0], [],
 PKG_CHECK_MODULES([SQLITE], [sqlite3 >= 3.22.0], [],
     [AC_MSG_ERROR([sqlite3 3.22.0 or higher is required])])
 
-ACX_PTHREAD([], [AC_MSG_ERROR([pthread is required])])
+AX_PTHREAD([],[AC_MSG_ERROR([pthread is required])])
 AS_IF([test "x$PTHREAD_CC" != x], [ CC="$PTHREAD_CC" ])
 
 ### plugins