diff --git a/modules/completion/external b/modules/completion/external
index 955645c..8ec8c8c 160000
--- a/modules/completion/external
+++ b/modules/completion/external
@@ -1 +1 @@
-Subproject commit 955645c22b29434caefadcb7d541d570d40ae932
+Subproject commit 8ec8c8c5c662c3cb77231b7458ce1975d2f8c967
diff --git a/modules/prompt/external/agnoster b/modules/prompt/external/agnoster
index 3ad94b6..6bba672 160000
--- a/modules/prompt/external/agnoster
+++ b/modules/prompt/external/agnoster
@@ -1 +1 @@
-Subproject commit 3ad94b659910c775a6560c45b1524d23d8c83b09
+Subproject commit 6bba672c7812a76defc3efed9b6369eeee2425dc
diff --git a/modules/syntax-highlighting/external b/modules/syntax-highlighting/external
index d6586e2..e900ad8 160000
--- a/modules/syntax-highlighting/external
+++ b/modules/syntax-highlighting/external
@@ -1 +1 @@
-Subproject commit d6586e2a4f54a66808aba3c325a614d5166342f8
+Subproject commit e900ad8bad53501689afcb050456400d7a8466e5
diff --git a/scripts/update_zprezto b/scripts/update_zprezto
index 2344476..e715472 100755
--- a/scripts/update_zprezto
+++ b/scripts/update_zprezto
@@ -6,7 +6,7 @@ cd ~/.zprezto
 
 git fetch upstream
 git checkout master
-git merge -m "Merged" upstream/master
+git merge -m "Merge upstream/master" upstream/master
 git submodule update --init --recursive
 
 cd -