diff --git a/requirements-to-freeze.txt b/requirements-to-freeze.txt
index 00b7e523..adeb0032 100644
--- a/requirements-to-freeze.txt
+++ b/requirements-to-freeze.txt
@@ -1,5 +1,6 @@
 pytest
 pytest-cov
 pytest-httpbin
+PySocks
 sphinx
 codecov
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index dbe1da6c..fec3ba41 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,6 +13,7 @@ Jinja2==2.9.4
 MarkupSafe==0.23
 py==1.4.32
 Pygments==2.1.3
+PySocks==1.6.5
 pytest==3.0.5
 pytest-cov==2.4.0
 pytest-httpbin==0.2.3