diff --git a/requires/development.txt b/requires/development.txt
index 714698b..cd0ebfc 100644
--- a/requires/development.txt
+++ b/requires/development.txt
@@ -1,4 +1,4 @@
 -e .
 -r testing.txt
 -r docs.txt
-flake8
+flake8==3.7.8
diff --git a/requires/docs.txt b/requires/docs.txt
index 57c7a26..9193cba 100644
--- a/requires/docs.txt
+++ b/requires/docs.txt
@@ -1 +1 @@
-sphinx==1.8.2
+sphinx==2.2.0
diff --git a/requires/testing.txt b/requires/testing.txt
index 4d65e4b..c732c17 100644
--- a/requires/testing.txt
+++ b/requires/testing.txt
@@ -1,3 +1,3 @@
-coverage>=4.5,<5
-nose>=1.3.7,<2
-tox>=3.5,<4
+coverage==4.5.4
+nose==1.3.7
+tox==3.13.2