diff --git a/cipd b/cipd
index b141ac128..3e004da23 100755
--- a/cipd
+++ b/cipd
@@ -32,6 +32,9 @@ case $UNAME in
   x86_64|amd64)
     ARCH=amd64
     ;;
+  s390x)  # best-effort support for IBM s390x: crbug.com/764087
+    ARCH=s390x
+    ;;
   arm*)
     ARCH=$UNAME
     ;;
diff --git a/cipd_client_version b/cipd_client_version
index 5d2ca0f19..15a28cf85 100644
--- a/cipd_client_version
+++ b/cipd_client_version
@@ -1 +1 @@
-git_revision:cf5b0de14e94b06274d15e84b19449f580576e80
+git_revision:0aa5e4d06ec4d3b90980fcb0d0b7c34a5e65b9e1