diff --git a/requirements-lock-dev.txt b/requirements-lock-dev.txt
index 1c17df6..bcd5538 100644
--- a/requirements-lock-dev.txt
+++ b/requirements-lock-dev.txt
@@ -89,7 +89,7 @@ py==1.8.0                 # via pytest
 pycodestyle==2.5.0        # via flake8
 pydocstyle==4.0.1         # via flake8-docstrings
 pyflakes==2.1.1           # via flake8
-pygments==2.0.2           # via import-order, ipython, nbconvert, sphinx
+pygments==2.7.4           # via import-order, ipython, nbconvert, sphinx
 pyparsing==2.4.4          # via bibtexparser, matplotlib, packaging, svgwrite
 pyrsistent==0.15.5        # via jsonschema
 pytest-cov==2.8.1