diff --git a/.gitignore b/.gitignore
index cacea2e..3fe0a7c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 /chrony-4.0-pre1.tar.gz
 /chrony-4.0-pre1-tar-gz-asc.txt
-/clknetsim-09cbc3.tar.gz
+/clknetsim-cbea2f.tar.gz
diff --git a/chrony.spec b/chrony.spec
index de07f89..6d3c675 100644
--- a/chrony.spec
+++ b/chrony.spec
@@ -1,6 +1,6 @@
 %global _hardened_build 1
 %global prerelease -pre1
-%global clknetsim_ver 09cbc3
+%global clknetsim_ver cbea2f
 %bcond_without debug
 %bcond_without nts
 
@@ -149,7 +149,7 @@ echo 'chronyd.service' > \
 
 %check
 # set random seed to get deterministic results
-export CLKNETSIM_RANDOM_SEED=24502
+export CLKNETSIM_RANDOM_SEED=24505
 make %{?_smp_mflags} -C test/simulation/clknetsim
 make quickcheck
 
diff --git a/sources b/sources
index 3856e6a..25882ed 100644
--- a/sources
+++ b/sources
@@ -1,3 +1,3 @@
 SHA512 (chrony-4.0-pre1.tar.gz) = 0b850d57fded23ac3cfe5907edb2a2b8441397a37575ce3b4af54f3b8f28ae7ae74f92926f619e4907a24d9bc10bb6b416bfe3ccc9d567720e3511d7f9513c59
 SHA512 (chrony-4.0-pre1-tar-gz-asc.txt) = 882ad890b500a4cfb2a33bd0804ccbe6548d415cad1ec21930957d55d2eec6a56647f909e928eba78da47d2227bfeeb9a6db1bb52dccbae24470a76a99b92cc5
-SHA512 (clknetsim-09cbc3.tar.gz) = 6910121e77bc4976b5b684d49cc376990f95275a27e73ecc1f7c50000f160a9e4f4a2faf6c6e2abfe566c557719a39a2dc1a4fffc5483024fe8d5dc2c4277d37
+SHA512 (clknetsim-cbea2f.tar.gz) = 75a82ecec352b2604477885cb091d61237bff2b2481eaa342b158cefa67c9e9dfe88bb49f01ff1b0d6b0636008a0da188de307af1ceab2c5e1456d7885b2fbe2