diff --git a/conda/artiq/meta.yaml b/conda/artiq/meta.yaml
index ca300b8d3..cd22f0919 100644
--- a/conda/artiq/meta.yaml
+++ b/conda/artiq/meta.yaml
@@ -25,7 +25,7 @@ requirements:
     - numpy
     - prettytable
     - asyncserial
-    - sphinx
+    - sphinx =1.4.8
     - sphinx-argparse
     - sphinxcontrib-wavedrom
     - sphinx_rtd_theme