diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3e75f80852fc77dd7243e19d5776632fc73c3f41..4d17cf376aa6a51b22da58dd3892e9ea37362847 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -48,7 +48,19 @@ build:
     - gitchangelog | sed -r '1,/^# Changelog$/s/^(# Changelog)$/#\1/' >> README.md
     - python setup.py sdist
 
-Install test:
+python safety:
+  stage: check
+  image: it4innovations/docker-pycheck:latest
+  before_script:
+    - virtualenv .venv
+  script:
+    - source .venv/bin/activate
+    - pip install --upgrade pip setuptools
+    - pip install dist/pipdeps*tar.gz
+    - pip list
+    - pip freeze | safety check --stdin --full-report
+
+install test:
   stage: check
   image: it4innovations/docker-pypi:latest
   before_script:
@@ -62,7 +74,7 @@ Install test:
     - pipdeps --table || true
     - pipdeps --upgrade
 
-versioncheck:
+version check:
   stage: check
   image: it4innovations/docker-pypi:latest
   before_script:
diff --git a/README.md b/README.md
index 92690e57bad38e6a1a7c1e076b5dc7926bcd4ee1..e0fd39931b2e3498f129317399a5747a135aec06 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ dependencies.
 optional arguments:
   -h, --help            show this help message and exit
   -e [EXCLUDE [EXCLUDE ...]], --exclude [EXCLUDE [EXCLUDE ...]]
-                        Comma separated list of excluded package (and
+                        Space-separated list of excluded package (and
                         version). Format package==version or package for all
                         versions
   -l, --list            show list of upgradeable packages and versions
diff --git a/pipdeps/pipdeps.py b/pipdeps/pipdeps.py
index e022823cb6d8b28c7b2560a71676944081066615..25431c537a38bbdb0bd30337e7f8c985760571da 100644
--- a/pipdeps/pipdeps.py
+++ b/pipdeps/pipdeps.py
@@ -458,7 +458,7 @@ def get_available_vers(package):
     try:
         data = get_json("https://pypi.python.org/pypi/%s/json" % (package))
     except urllib2.HTTPError, err:
-        print "%s %s" % (err, err.url)
+        print "{} {}".format(err, err.url)
         raise urllib2.HTTPError(err.url, err.code, None, err.hdrs, err.fp)
     releases = data["releases"].keys()
     for release in releases: