diff --git a/requirements-dev.txt b/requirements-dev.txt
index 0fd83b1..503fec0 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -10,6 +10,18 @@
 # `Pipfile.lock` and then regenerate `requirements*.txt`.
 ################################################################################
 
-beautifulsoup4
-pylama
-pytest
+atomicwrites==1.3.0
+attrs==19.1.0
+beautifulsoup4==4.7.1
+mccabe==0.6.1
+more-itertools==6.0.0
+pluggy==0.9.0
+py==1.8.0
+pycodestyle==2.5.0
+pydocstyle==3.0.0
+pyflakes==2.1.1
+pylama==7.6.6
+pytest==4.3.0
+six==1.12.0
+snowballstemmer==1.2.1
+soupsieve==1.8
diff --git a/requirements.txt b/requirements.txt
index 6435b59..0f7d998 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,5 +10,11 @@
 # `Pipfile.lock` and then regenerate `requirements*.txt`.
 ################################################################################
 
-jinja2
+jinja2==2.10
+markupsafe==1.1.1
 pendulum==1.5.1
+python-dateutil==2.8.0
+pytz==2018.9
+pytzdata==2018.9
+six==1.12.0
+tzlocal==1.5.1