diff --git a/CHANGELOG.md b/CHANGELOG.md
index fb15b88..3134f5f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## v0.4.2
+- Fix bug in zsh versions older than 5.0.8 (#296)
+- Officially support back to zsh v4.3.11
+
 ## v0.4.1
 - Switch to [[ and (( conditionals instead of [ (#257)
 - Avoid warnnestedvar warnings with `typeset -g` (#275)
diff --git a/Makefile b/Makefile
index 5402b7f..d5d162c 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,7 @@ SRC_DIR    := ./src
 SRC_FILES := \
 	$(SRC_DIR)/setup.zsh \
 	$(SRC_DIR)/config.zsh \
+	$(SRC_DIR)/util.zsh \
 	$(SRC_DIR)/features.zsh \
 	$(SRC_DIR)/bind.zsh \
 	$(SRC_DIR)/highlight.zsh \
diff --git a/README.md b/README.md
index 8aedb31..6a6ae1e 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,8 @@ It suggests commands as you type, based on command history.
 
 ## Installation
 
+Requirements: Zsh v4.3.11 or later
+
 ### Manual
 
 1. Clone this repository somewhere on your machine. This guide will assume `~/.zsh/zsh-autosuggestions`.
diff --git a/VERSION b/VERSION
index 5aff472..0eec13e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-v0.4.1
+v0.4.2
diff --git a/circle.yml b/circle.yml
index 5e3a6f6..d0f7633 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,12 +1,12 @@
 machine:
   environment:
-    ZSH_VERSIONS: 5.0.8 5.1.1 5.2 5.3.1
+    ZSH_VERSIONS: zsh-dev/4.3.11 zsh/5.0.2 zsh/5.0.8 zsh/5.1.1 zsh/5.2 zsh/5.3.1 zsh/5.4.2
 
 dependencies:
   pre:
-    - for v in $(echo $ZSH_VERSIONS | awk "{ for (i=$((1+CIRCLE_NODE_INDEX));i<=NF;i+=$CIRCLE_NODE_TOTAL) print \$i }"); do wget https://sourceforge.net/projects/zsh/files/zsh/$v/zsh-$v.tar.gz && tar xzf zsh-$v.tar.gz && cd zsh-$v && ./configure && sudo make install || exit 1; done
+    - for v in $(echo $ZSH_VERSIONS | awk "{ for (i=$((1+CIRCLE_NODE_INDEX));i<=NF;i+=$CIRCLE_NODE_TOTAL) print \$i }"); do wget https://sourceforge.net/projects/zsh/files/$v/zsh-${v#*/}.tar.gz && tar xzf zsh-${v#*/}.tar.gz && pushd zsh-${v#*/} && ./configure && sudo make install && popd || exit 1; done
 
 test:
   override:
-    - for v in $(echo $ZSH_VERSIONS | awk "{ for (i=$((1+CIRCLE_NODE_INDEX));i<=NF;i+=$CIRCLE_NODE_TOTAL) print \$i }"); do TEST_ZSH_BIN=/usr/local/bin/zsh-$v make test || exit 1; done:
+    - for v in $(echo $ZSH_VERSIONS | awk "{ for (i=$((1+CIRCLE_NODE_INDEX));i<=NF;i+=$CIRCLE_NODE_TOTAL) print \$i }"); do TEST_ZSH_BIN=/usr/local/bin/zsh-${v#*/} make test || exit 1; done:
         parallel: true
diff --git a/src/strategies/default.zsh b/src/strategies/default.zsh
index 17bf65d..0e85fb5 100644
--- a/src/strategies/default.zsh
+++ b/src/strategies/default.zsh
@@ -7,9 +7,19 @@
 #
 
 _zsh_autosuggest_strategy_default() {
-	local prefix="$1"
+	# Reset options to defaults and enable LOCAL_OPTIONS
+	emulate -L zsh
+
+	# Enable globbing flags so that we can use (#m)
+	setopt EXTENDED_GLOB
+
+	# Escape backslashes and all of the glob operators so we can use
+	# this string as a pattern to search the $history associative array.
+	# - (#m) globbing flag enables setting references for match data
+	# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
+	local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 
 	# Get the history items that match
 	# - (r) subscript flag makes the pattern match on values
-	typeset -g suggestion="${history[(r)${(b)prefix}*]}"
+	typeset -g suggestion="${history[(r)${prefix}*]}"
 }
diff --git a/src/strategies/match_prev_cmd.zsh b/src/strategies/match_prev_cmd.zsh
index 8a84728..f76d3c1 100644
--- a/src/strategies/match_prev_cmd.zsh
+++ b/src/strategies/match_prev_cmd.zsh
@@ -21,18 +21,25 @@
 # `HIST_EXPIRE_DUPS_FIRST`.
 
 _zsh_autosuggest_strategy_match_prev_cmd() {
-	local prefix="$1"
+	# Reset options to defaults and enable LOCAL_OPTIONS
+	emulate -L zsh
+
+	# Enable globbing flags so that we can use (#m)
+	setopt EXTENDED_GLOB
+
+	# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
+	local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 
 	# Get all history event numbers that correspond to history
 	# entries that match pattern $prefix*
 	local history_match_keys
-	history_match_keys=(${(k)history[(R)${(b)prefix}*]})
+	history_match_keys=(${(k)history[(R)$prefix*]})
 
 	# By default we use the first history number (most recent history entry)
 	local histkey="${history_match_keys[1]}"
 
 	# Get the previously executed command
-	local prev_cmd="${history[$((HISTCMD-1))]}"
+	local prev_cmd="$(_zsh_autosuggest_escape_command "${history[$((HISTCMD-1))]}")"
 
 	# Iterate up to the first 200 history event numbers that match $prefix
 	for key in "${(@)history_match_keys[1,200]}"; do
diff --git a/src/util.zsh b/src/util.zsh
new file mode 100644
index 0000000..1f55d36
--- /dev/null
+++ b/src/util.zsh
@@ -0,0 +1,11 @@
+
+#--------------------------------------------------------------------#
+# Utility Functions                                                  #
+#--------------------------------------------------------------------#
+
+_zsh_autosuggest_escape_command() {
+	setopt localoptions EXTENDED_GLOB
+
+	# Escape special chars in the string (requires EXTENDED_GLOB)
+	echo -E "${1//(#m)[\"\'\\()\[\]|*?~]/\\$MATCH}"
+}
diff --git a/zsh-autosuggestions.zsh b/zsh-autosuggestions.zsh
index fadbac7..ccfe07e 100644
--- a/zsh-autosuggestions.zsh
+++ b/zsh-autosuggestions.zsh
@@ -1,6 +1,6 @@
 # Fish-like fast/unobtrusive autosuggestions for zsh.
 # https://github.com/zsh-users/zsh-autosuggestions
-# v0.4.1
+# v0.4.2
 # Copyright (c) 2013 Thiago de Arruda
 # Copyright (c) 2016-2017 Eric Freese
 # 
@@ -101,6 +101,17 @@ ZSH_AUTOSUGGEST_BUFFER_MAX_SIZE=
 # Pty name for calculating autosuggestions asynchronously
 ZSH_AUTOSUGGEST_ASYNC_PTY_NAME=zsh_autosuggest_pty
 
+#--------------------------------------------------------------------#
+# Utility Functions                                                  #
+#--------------------------------------------------------------------#
+
+_zsh_autosuggest_escape_command() {
+	setopt localoptions EXTENDED_GLOB
+
+	# Escape special chars in the string (requires EXTENDED_GLOB)
+	echo -E "${1//(#m)[\"\'\\()\[\]|*?~]/\\$MATCH}"
+}
+
 #--------------------------------------------------------------------#
 # Feature Detection                                                  #
 #--------------------------------------------------------------------#
@@ -478,11 +489,21 @@ zle -N autosuggest-toggle _zsh_autosuggest_widget_toggle
 #
 
 _zsh_autosuggest_strategy_default() {
-	local prefix="$1"
+	# Reset options to defaults and enable LOCAL_OPTIONS
+	emulate -L zsh
+
+	# Enable globbing flags so that we can use (#m)
+	setopt EXTENDED_GLOB
+
+	# Escape backslashes and all of the glob operators so we can use
+	# this string as a pattern to search the $history associative array.
+	# - (#m) globbing flag enables setting references for match data
+	# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
+	local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 
 	# Get the history items that match
 	# - (r) subscript flag makes the pattern match on values
-	typeset -g suggestion="${history[(r)${(b)prefix}*]}"
+	typeset -g suggestion="${history[(r)${prefix}*]}"
 }
 
 #--------------------------------------------------------------------#
@@ -507,18 +528,25 @@ _zsh_autosuggest_strategy_default() {
 # `HIST_EXPIRE_DUPS_FIRST`.
 
 _zsh_autosuggest_strategy_match_prev_cmd() {
-	local prefix="$1"
+	# Reset options to defaults and enable LOCAL_OPTIONS
+	emulate -L zsh
+
+	# Enable globbing flags so that we can use (#m)
+	setopt EXTENDED_GLOB
+
+	# TODO: Use (b) flag when we can drop support for zsh older than v5.0.8
+	local prefix="${1//(#m)[\\*?[\]<>()|^~#]/\\$MATCH}"
 
 	# Get all history event numbers that correspond to history
 	# entries that match pattern $prefix*
 	local history_match_keys
-	history_match_keys=(${(k)history[(R)${(b)prefix}*]})
+	history_match_keys=(${(k)history[(R)$prefix*]})
 
 	# By default we use the first history number (most recent history entry)
 	local histkey="${history_match_keys[1]}"
 
 	# Get the previously executed command
-	local prev_cmd="${history[$((HISTCMD-1))]}"
+	local prev_cmd="$(_zsh_autosuggest_escape_command "${history[$((HISTCMD-1))]}")"
 
 	# Iterate up to the first 200 history event numbers that match $prefix
 	for key in "${(@)history_match_keys[1,200]}"; do