diff --git a/WHENCE b/WHENCE
index c6074ec..1845a8f 100644
--- a/WHENCE
+++ b/WHENCE
@@ -565,10 +565,12 @@ Found in hex form in kernel source.
 
 --------------------------------------------------------------------------
 
-Driver: cxgb4 - Chelsio Terminator 4 1G/10G Ethernet adapter
+Driver: cxgb4 - Chelsio Terminator 4/5 1G/10/40G Ethernet adapter
 
-File: cxgb4/t4fw-1.6.2.0.bin
-Link: cxgb4/t4fw.bin -> t4fw-1.6.2.0.bin
+File: cxgb4/t4fw-1.9.23.0.bin
+Link: cxgb4/t4fw.bin -> t4fw-1.9.23.0.bin
+File: cxgb4/t5fw-1.9.23.0.bin
+Link: cxgb4/t5fw.bin -> t5fw-1.9.23.0.bin
 
 Licence: Redistributable. See LICENCE.chelsio_firmware for details
 
diff --git a/cxgb4/t4fw-1.6.2.0.bin b/cxgb4/t4fw-1.6.2.0.bin
deleted file mode 100644
index cf2b50f..0000000
Binary files a/cxgb4/t4fw-1.6.2.0.bin and /dev/null differ
diff --git a/cxgb4/t4fw-1.9.23.0.bin b/cxgb4/t4fw-1.9.23.0.bin
new file mode 100644
index 0000000..424867d
Binary files /dev/null and b/cxgb4/t4fw-1.9.23.0.bin differ
diff --git a/cxgb4/t4fw.bin b/cxgb4/t4fw.bin
index 830cc68..0d51c41 120000
--- a/cxgb4/t4fw.bin
+++ b/cxgb4/t4fw.bin
@@ -1 +1 @@
-t4fw-1.6.2.0.bin
\ No newline at end of file
+t4fw-1.9.23.0.bin
\ No newline at end of file
diff --git a/cxgb4/t5fw-1.9.23.0.bin b/cxgb4/t5fw-1.9.23.0.bin
new file mode 100644
index 0000000..4bb2254
Binary files /dev/null and b/cxgb4/t5fw-1.9.23.0.bin differ
diff --git a/cxgb4/t5fw.bin b/cxgb4/t5fw.bin
new file mode 120000
index 0000000..e9f5afe
--- /dev/null
+++ b/cxgb4/t5fw.bin
@@ -0,0 +1 @@
+t5fw-1.9.23.0.bin
\ No newline at end of file