diff --git a/modules/completion/external b/modules/completion/external
index 8ec8c8c..cf56525 160000
--- a/modules/completion/external
+++ b/modules/completion/external
@@ -1 +1 @@
-Subproject commit 8ec8c8c5c662c3cb77231b7458ce1975d2f8c967
+Subproject commit cf565254e26bb7ce03f51889e9a29953b955b1fb
diff --git a/modules/fasd/external b/modules/fasd/external
index 90b531a..4822024 160000
--- a/modules/fasd/external
+++ b/modules/fasd/external
@@ -1 +1 @@
-Subproject commit 90b531a5daaa545c74c7d98974b54cbdb92659fc
+Subproject commit 48220241e764fdf46b075cd7fe723468aaadde58
diff --git a/modules/history-substring-search/external b/modules/history-substring-search/external
index 47a7d41..aae3388 160000
--- a/modules/history-substring-search/external
+++ b/modules/history-substring-search/external
@@ -1 +1 @@
-Subproject commit 47a7d416c652a109f6e8856081abc042b50125f4
+Subproject commit aae3388491c2312c4efb2e86bcb999927bb2900e
diff --git a/modules/history/README.md b/modules/history/README.md
index d020688..a5a4acb 100644
--- a/modules/history/README.md
+++ b/modules/history/README.md
@@ -8,8 +8,9 @@ Options
 
   - `BANG_HIST` treats the **!** character specially during expansion.
   - `EXTENDED_HISTORY` writes the history file in the *:start:elapsed;command* format.
-  - `INC_APPEND_HISTORY` writes to the history file immediately, not when the shell exits.
-  - `SHARE_HISTORY` shares history between all sessions.
+  - `SHARE_HISTORY` shares history between all sessions. Note that
+    `SHARE_HISTORY`, `INC_APPEND_HISTORY`, and `INC_APPEND_HISTORY_TIME` are
+    mutually exclusive.
   - `HIST_EXPIRE_DUPS_FIRST` expires a duplicate event first when trimming history.
   - `HIST_IGNORE_DUPS` does not record an event that was just recorded again.
   - `HIST_IGNORE_ALL_DUPS` deletes an old recorded event if a new event is a duplicate.
diff --git a/modules/history/init.zsh b/modules/history/init.zsh
index db357b0..a26f3c9 100644
--- a/modules/history/init.zsh
+++ b/modules/history/init.zsh
@@ -12,7 +12,6 @@
 
 setopt BANG_HIST                 # Treat the '!' character specially during expansion.
 setopt EXTENDED_HISTORY          # Write the history file in the ':start:elapsed;command' format.
-setopt INC_APPEND_HISTORY        # Write to the history file immediately, not when the shell exits.
 setopt SHARE_HISTORY             # Share history between all sessions.
 setopt HIST_EXPIRE_DUPS_FIRST    # Expire a duplicate event first when trimming history.
 setopt HIST_IGNORE_DUPS          # Do not record an event that was just recorded again.
diff --git a/modules/node/init.zsh b/modules/node/init.zsh
index f452ec5..d8eea14 100644
--- a/modules/node/init.zsh
+++ b/modules/node/init.zsh
@@ -34,7 +34,7 @@ fi
 typeset -A compl_commands=(
   npm   'npm completion'
   grunt 'grunt --completion=zsh'
-  gupl  'gulp --completion=zsh'
+  gulp  'gulp --completion=zsh'
 )
 
 for compl_command in "${(k)compl_commands[@]}"; do
diff --git a/modules/prompt/external/pure b/modules/prompt/external/pure
index fa9137e..7aade5f 160000
--- a/modules/prompt/external/pure
+++ b/modules/prompt/external/pure
@@ -1 +1 @@
-Subproject commit fa9137ecec76d23fe76fd6fabe9c2f8ae0de9cf5
+Subproject commit 7aade5fca2acae3f10e260d0c076af6356da9dc6
diff --git a/modules/prompt/functions/prompt_sorin_setup b/modules/prompt/functions/prompt_sorin_setup
index 14f8858..2df9212 100644
--- a/modules/prompt/functions/prompt_sorin_setup
+++ b/modules/prompt/functions/prompt_sorin_setup
@@ -110,8 +110,6 @@ function prompt_sorin_setup {
   setopt LOCAL_OPTIONS
   unsetopt XTRACE KSH_ARRAYS
   prompt_opts=(cr percent sp subst)
-  _prompt_sorin_precmd_async_pid=0
-  _prompt_sorin_precmd_async_data=$(mktemp "${TMPDIR:-/tmp}/sorin-prompt-async-XXXXXXXXXX")
 
   # Load required functions.
   autoload -Uz add-zsh-hook
diff --git a/modules/syntax-highlighting/external b/modules/syntax-highlighting/external
index e900ad8..1e34c4a 160000
--- a/modules/syntax-highlighting/external
+++ b/modules/syntax-highlighting/external
@@ -1 +1 @@
-Subproject commit e900ad8bad53501689afcb050456400d7a8466e5
+Subproject commit 1e34c4aa0bcbdde5173aab15600784edf0a212fd