diff --git a/bittwist-linux-3.7.tar.gz b/bittwist-linux-3.7.tar.gz
deleted file mode 100644
index 9f54bf0..0000000
--- a/bittwist-linux-3.7.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:af6ed5415db03d2e9f9e7ee830133f674fa6a443747c8c8b5dc7027ae6c364cc
-size 76592
diff --git a/bittwist-linux-3.8.tar.gz b/bittwist-linux-3.8.tar.gz
new file mode 100644
index 0000000..098bd40
--- /dev/null
+++ b/bittwist-linux-3.8.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:728cc8aa0cfcadaac2423f43304155caaa83bf7e6edb94fc2c349a6cecbaef21
+size 81298
diff --git a/bittwist.changes b/bittwist.changes
index 24769a7..55e4334 100644
--- a/bittwist.changes
+++ b/bittwist.changes
@@ -1,3 +1,14 @@
+-------------------------------------------------------------------
+Fri Sep 22 08:58:49 UTC 2023 - Ming Li <mli@suse.com>
+
+- Update to version 3.8
+  * bumped from gcc -O2 to -O3 optimization flag:
+    https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html#index-O3
+  bittwist (generator)
+  * added RFC 2544 benchmark data generator and benchmark page
+  * improved actual inter-packet gap replay by using token bucket algorithm for
+    short IPG and self-regulated timer for long IPG
+
 -------------------------------------------------------------------
 Sun Jul  2 11:53:58 UTC 2023 - Martin Hauke <mardnh@gmx.de>
 
diff --git a/bittwist.spec b/bittwist.spec
index 09569bd..2867411 100644
--- a/bittwist.spec
+++ b/bittwist.spec
@@ -18,7 +18,7 @@
 
 
 Name:           bittwist
-Version:        3.7
+Version:        3.8
 Release:        0
 Summary:        A libpcap-based Ethernet packet generator
 License:        GPL-2.0-only