diff --git a/afl.changes b/afl.changes
index 48ef925..4b9f8a5 100644
--- a/afl.changes
+++ b/afl.changes
@@ -1,3 +1,45 @@
+-------------------------------------------------------------------
+Mon Jun 10 08:12:20 UTC 2024 - Marcus Meissner <meissner@suse.com>
+
+- updated to 4.21c
+  * afl-fuzz
+    - fixed a regression in afl-fuzz that resulted in a 5-10% performace loss
+      do a switch from gettimeofday() to clock_gettime() which should be rather
+      three times faster. The reason for this is unknown.
+    - new queue selection algorithm based on 2 core years of queue data
+      analysis. gives a noticable improvement on coverage although the results
+      seem counterintuitive :-)
+    - added AFL_DISABLE_REDUNDANT for huge queues
+    - added `AFL_NO_SYNC` environment variable that does what you think it does
+    - fix AFL_PERSISTENT_RECORD
+    - run custom_post_process after standard trimming
+    - prevent filenames in the queue that have spaces
+    - minor fix for FAST schedules
+    - more frequent stats update when syncing (todo: check performance impact)
+    - now timing of calibration, trimming and syncing is measured seperately,
+      thanks to @eqv!
+    - -V timing is now accurately the fuzz time (without syncing), before
+      long calibration times and syncing could result in now fuzzing being
+      made when the time was already run out until then, thanks to @eqv!
+    - fix -n uninstrumented mode when ending fuzzing
+    - enhanced the ASAN configuration
+    - make afl-fuzz use less memory with cmplog and fix a memleak
+  * afl-cc:
+    - re-enable i386 support that was accidently disabled
+    - fixes for LTO and outdated afl-gcc mode for i386
+    - fix COMPCOV split compare for old LLVMs
+    - disable xml/curl/g_ string transform functions because we do not check
+      for null pointers ... TODO
+    - ensure shared memory variables are visible in weird build setups
+    - compatability to new LLVM 19 changes
+  * afl-cmin
+    - work with input files that have a space
+  * afl-showmap
+    - fix memory leak on shmem testcase usage (thanks to @ndrewh)
+    - minor fix to collect coverage -C (thanks to @bet4it)
+  * Fixed a shmem mmap bug (that rarely came up on MacOS)
+  * libtokencap: script generate_libtoken_dict.sh added by @a-shvedov 
+
 -------------------------------------------------------------------
 Mon Apr 15 09:44:22 UTC 2024 - Marcus Meissner <meissner@suse.com>
 
diff --git a/afl.spec b/afl.spec
index 5d8000a..030cf40 100644
--- a/afl.spec
+++ b/afl.spec
@@ -27,7 +27,7 @@
 %endif
 
 Name:           afl
-Version:        4.20c
+Version:        4.21c
 Release:        0
 Summary:        American fuzzy lop is a security-oriented fuzzer
 #URL:            https://lcamtuf.coredump.cx/afl/
diff --git a/v4.20c.tar.gz b/v4.20c.tar.gz
deleted file mode 100644
index 0b1e633..0000000
--- a/v4.20c.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:855ddefbe9c88911146c1b7cb50dc5423b7623a7a59343f34f31bf038a865a24
-size 2997342
diff --git a/v4.21c.tar.gz b/v4.21c.tar.gz
new file mode 100644
index 0000000..e7f744a
--- /dev/null
+++ b/v4.21c.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:11f7c77d37cff6e7f65ac7cc55bab7901e0c6208e845a38764394d04ed567b30
+size 3004235