diff --git a/requirements-dev.txt b/requirements-dev.txt
index cb08cbc..3ddeca7 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,13 +1,25 @@
 -i https://pypi.org/simple
 atomicwrites==1.3.0
 attrs==19.1.0
+backcall==0.1.0
+decorator==4.4.0
 importlib-metadata==0.18
+ipython-genutils==0.2.0
+ipython==7.7.0
+jedi==0.14.1
 more-itertools==7.2.0
 packaging==19.0
+parso==0.5.1
+pexpect==4.7.0 ; sys_platform != 'win32'
+pickleshare==0.7.5
 pluggy==0.12.0
+prompt-toolkit==2.0.9
+ptyprocess==0.6.0
 py==1.8.0
+pygments==2.4.2
 pyparsing==2.4.1.1
 pytest==5.0.1
 six==1.12.0
+traitlets==4.3.2
 wcwidth==0.1.7
 zipp==0.5.2
diff --git a/requirements.txt b/requirements.txt
index fc70647..c568bfc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,3 +5,4 @@ python-dateutil==2.8.0
 python-stdnum==1.11
 pytz==2019.1
 six==1.12.0
+xlrd==1.2.0