diff --git a/doc/requirements.txt b/doc/requirements.txt
index bfc0fd99..4ec264f0 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,5 +1,5 @@
 pygments
-demjson
+demjson3
 doc8
 jsonschema
 Sphinx
diff --git a/test-requirements.txt b/test-requirements.txt
index ae4d8b59..4b527e72 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,5 +1,5 @@
 pygments
-demjson
+demjson3
 doc8
 jsonschema
 Sphinx