diff --git a/baselibs.conf b/baselibs.conf
index d2da61b..b19aee5 100644
--- a/baselibs.conf
+++ b/baselibs.conf
@@ -1,4 +1,4 @@
-libmuparser2_3_2
+libmuparser2_3_3
 muparser-devel
-	requires "libmuparser2_3_2-<targettype> = <version>"
+	requires "libmuparser2_3_3-<targettype> = <version>"
 
diff --git a/muparser-abiversion.diff b/muparser-abiversion.diff
index 7e92b6f..baaf8a8 100644
--- a/muparser-abiversion.diff
+++ b/muparser-abiversion.diff
@@ -15,15 +15,20 @@ The abidiff(1) report from libabigail:
 
 Work around this messup by using the full version as unique SONAME.
 
-diff -ru a/CMakeLists.txt b/CMakeLists.txt
---- a/CMakeLists.txt	2020-06-17 10:52:15.574640873 +0200
-+++ b/CMakeLists.txt	2020-06-17 00:09:53.000000000 +0200
-@@ -74,7 +74,7 @@
- endif()
+---
+ CMakeLists.txt |    2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+Index: muparser-2.3.3/CMakeLists.txt
+===================================================================
+--- muparser-2.3.3.orig/CMakeLists.txt
++++ muparser-2.3.3/CMakeLists.txt
+@@ -75,7 +75,7 @@ endif()
+ 
  set_target_properties(muparser PROPERTIES
      VERSION ${MUPARSER_VERSION}
-+    SOVERSION ${MUPARSER_VERSION}
 -    SOVERSION ${MUPARSER_VERSION_MAJOR}
++    SOVERSION ${MUPARSER_VERSION}
  )
  
- # Install the export set for use with the install-tree
+ if(ENABLE_SAMPLES)
diff --git a/muparser.changes b/muparser.changes
index 3685d0e..217c845 100644
--- a/muparser.changes
+++ b/muparser.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Sat Jan 22 21:00:46 UTC 2022 - Jan Engelhardt <jengelh@inai.de>
+
+- Update to release 2.3.3.1
+  * Some issues found by fuzzers were fixed.
+
 -------------------------------------------------------------------
 Wed Jun 17 08:54:21 UTC 2020 - Paolo Stivanin <info@paolostivanin.com>
 
diff --git a/muparser.spec b/muparser.spec
index a949509..e32505c 100644
--- a/muparser.spec
+++ b/muparser.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package muparser
 #
-# Copyright (c) 2020 SUSE LLC
+# Copyright (c) 2022 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -17,14 +17,14 @@
 
 
 Name:           muparser
-%define lname	libmuparser2_3_2
-Version:        2.3.2
+%define lname	libmuparser2_3_3
+Version:        2.3.3.1
 Release:        0
 Summary:        A math parser library
 License:        MIT
 Group:          Productivity/Scientific/Math
 URL:            http://muparser.beltoforion.de/
-Source:         https://github.com/beltoforion/muparser/archive/v%{version}.tar.gz
+Source:         https://github.com/beltoforion/muparser/archive/v2.3.3-1.tar.gz
 Patch0:         muparser-abiversion.diff
 Source1:        baselibs.conf
 BuildRequires:  cmake
@@ -57,7 +57,7 @@ works by transforming a mathematical expression into bytecode and
 precalculating constant parts of the expression.
 
 %prep
-%autosetup -p1
+%autosetup -p1 -n %name-2.3.3-1
 
 %build
 %cmake \
@@ -72,12 +72,13 @@ precalculating constant parts of the expression.
 
 %files -n %lname
 %_libdir/libmuparser.so.2*
-%license License.txt
+%license LICENSE
 
 %files devel
 %_includedir/muParser*.h
 %_libdir/libmuparser.so
+%_libdir/cmake/
 %_libdir/pkgconfig/muparser.pc
-%doc Changes.txt
+%doc CHANGELOG
 
 %changelog
diff --git a/v2.3.2.tar.gz b/v2.3.2.tar.gz
deleted file mode 100644
index 166f143..0000000
--- a/v2.3.2.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b35fc84e3667d432e3414c8667d5764dfa450ed24a99eeef7ee3f6647d44f301
-size 103979
diff --git a/v2.3.3-1.tar.gz b/v2.3.3-1.tar.gz
new file mode 100644
index 0000000..e97f397
--- /dev/null
+++ b/v2.3.3-1.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:91d26d8274ae9cd9c776ee58250aeddc6b574f369eafd03b25045b858a2b8177
+size 112100