diff --git a/configure.ac b/configure.ac
index d3721c2..07a0af2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -9,9 +9,9 @@ dnl The PCRE2_PRERELEASE feature is for identifying release candidates. It might
 dnl be defined as -RC2, for example. For real releases, it should be empty.
 
 m4_define(pcre2_major, [10])
-m4_define(pcre2_minor, [39])
-m4_define(pcre2_prerelease, [])
-m4_define(pcre2_date, [2021-10-29])
+m4_define(pcre2_minor, [40])
+m4_define(pcre2_prerelease, [-RC1])
+m4_define(pcre2_date, [2021-11-09])
 
 # Libtool shared library interface versions (current:revision:age)
 m4_define(libpcre2_8_version,     [10:4:10])
diff --git a/testdata/testinput2 b/testdata/testinput2
index 731a64a..4acb429 100644
--- a/testdata/testinput2
+++ b/testdata/testinput2
@@ -5767,7 +5767,7 @@ a)"xI
 
 /(?(DEFINE)b)((?<=b).*)/B
 
-/(?(VERSION=10.4)b)((?<=b).*)/B
+/(?(VERSION=10.3)b)((?<=b).*)/B
 
 /[aA]b[cC]/IB
 
diff --git a/testdata/testoutput2 b/testdata/testoutput2
index 7479a0e..25d608d 100644
--- a/testdata/testoutput2
+++ b/testdata/testoutput2
@@ -17397,7 +17397,7 @@ Subject length lower bound = 1
         End
 ------------------------------------------------------------------
 
-/(?(VERSION=10.4)b)((?<=b).*)/B
+/(?(VERSION=10.3)b)((?<=b).*)/B
 ------------------------------------------------------------------
         Bra
         Cond