diff --git a/configure.ac b/configure.ac
index f66c1d27..285d836e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,7 +7,7 @@ AC_PREREQ([2.65])
 # The version is the concatenation of 'v' and the year, month, date: vyyyymmdd
 # To access this as a string or integer triple, see libsrc/eclib/version.h
 
-AC_INIT([eclib], [20220620], [john.cremona@gmail.com])
+AC_INIT([eclib], [20220621], [john.cremona@gmail.com])
 
 AM_INIT_AUTOMAKE([-Wall])
 AC_MSG_NOTICE([Configuring eclib...])
@@ -40,9 +40,9 @@ LT_INIT
 #
 # NB The suffix of the library name (libec.so here) is (c-a).a.r
 
-LT_CURRENT=9
-LT_REVISION=4
-LT_AGE=1
+LT_CURRENT=10
+LT_REVISION=0
+LT_AGE=0
 AC_SUBST(LT_CURRENT)
 AC_SUBST(LT_REVISION)
 AC_SUBST(LT_AGE)
diff --git a/tests/out_no_ntl/tversion.out b/tests/out_no_ntl/tversion.out
index 8e84df2d..b66b69de 100644
--- a/tests/out_no_ntl/tversion.out
+++ b/tests/out_no_ntl/tversion.out
@@ -1,12 +1,12 @@
-This eclib version is 20220620
-[ year month day ] = [ 2022 6 20 ]
+This eclib version is 20220621
+[ year month day ] = [ 2022 6 21 ]
 
 Configure options and compilation date:
 
-eclib version 20220620, using NTL bigints but no multiprecision floating point
+eclib version 20220621, using NTL bigints but no multiprecision floating point
 
 Testing comparison of version date and various (year, month, day) date triples:
 
-Date 20200101 is before the version date 20220620
-Date 20300611 is after the version date 20220620
-Date 20210317 is before the version date 20220620
+Date 20200101 is before the version date 20220621
+Date 20300611 is after the version date 20220621
+Date 20210317 is before the version date 20220621
diff --git a/tests/out_ntl/tversion.out b/tests/out_ntl/tversion.out
index 0a0d5a49..1e95098d 100644
--- a/tests/out_ntl/tversion.out
+++ b/tests/out_ntl/tversion.out
@@ -1,12 +1,12 @@
-This eclib version is 20220620
-[ year month day ] = [ 2022 6 20 ]
+This eclib version is 20220621
+[ year month day ] = [ 2022 6 21 ]
 
 Configure options and compilation date:
 
-eclib version 20220620, using NTL bigints and NTL real and complex multiprecision floating point
+eclib version 20220621, using NTL bigints and NTL real and complex multiprecision floating point
 
 Testing comparison of version date and various (year, month, day) date triples:
 
-Date 20200101 is before the version date 20220620
-Date 20300611 is after the version date 20220620
-Date 20210317 is before the version date 20220620
+Date 20200101 is before the version date 20220621
+Date 20300611 is after the version date 20220621
+Date 20210317 is before the version date 20220621