diff --git a/Makefile b/Makefile
index 6dcc6002..81a94ab1 100644
--- a/Makefile
+++ b/Makefile
@@ -26,8 +26,12 @@ info:
 	@echo jq version: `$(JQ) --version` "($(JQ))"
 	@echo react-modal version: $(VERSION)
 
-deps:
+deps: deps-project deps-docs
+
+deps-project:
 	@[[ ! -z "$(YARN)" ]] && $(YARN) install || $(NPM) install
+
+deps-docs:
 	@gitbook install
 
 # Rules for development
@@ -52,7 +56,7 @@ build:
 
 build-docs:
 	@echo "[Building documentation]"
-	@rm -rf _book/*
+	@rm -rf _book
 	@gitbook build -g reactjs/react-modal
 
 version:
@@ -78,12 +82,12 @@ publish-version: release-commit release-tag
 	npm publish
 	@rm .version
 
-publish: version build publish-version publish-finished
+publish: version deps-project build publish-version publish-finished
 
-publish-docs: build-docs
+publish-docs: deps-docs build-docs
 	@echo "[Publishing docs]"
+	git init _book
 	cd _book
-	git init
 	git commit --allow-empty -m 'update book'
 	git checkout -b gh-pages
 	touch .nojekyll
diff --git a/bootstrap.sh b/bootstrap.sh
new file mode 100644
index 00000000..70fc3326
--- /dev/null
+++ b/bootstrap.sh
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+NODE=`which node`
+NPM=`which npm`
+YARN=`which yarn`
+JQ=`which jq`
+
+echo $NODE $NPM $YARN $JQ
+
+if [[ ! -z "$NODE" ]]; then
+  echo "Node is installed and it's version is: `$NODE --version`"
+else
+  echo "Please, install node.js."
+  exit 1
+fi
+
+if [[ ! -z "$NPM" ]]; then
+  echo "NPM is installed and it's version is: `$NPM --version`"
+else
+  echo "Please, install npm."
+  exit 1
+fi
+
+if [[ ! -z "$YARN" ]]; then
+  echo "yarn is installed and it's version is: `$YARN --version`"
+else
+  echo "yarn is optional."
+fi
+
+if [[ ! -z "$JQ" ]]; then
+  echo "jq is installed and it's version is: `$JQ --version`"
+else
+  echo "jq is optional and used only for publish purpose."
+fi
+
+npm install -g gitbook-cli
diff --git a/scripts/version b/scripts/version
index 4e16838d..45710799 100644
--- a/scripts/version
+++ b/scripts/version
@@ -10,6 +10,11 @@ echo "Current version is: $1"
 
 read -p "Bump to: " NEW_VERSION
 
+if [[ ! -z "$(git tag -l | grep v${NEW_VERSION})" ]]; then
+    echo "Tag $NEW_VERSION already exists."
+    exit 1
+fi
+
 FILES="package.json bower.json"
 
 for F in $FILES; do