diff --git a/.readthedocs.yml b/.readthedocs.yml
index 79428ad..0d7d01e 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -9,7 +9,7 @@ formats:
 build:
   os: ubuntu-22.04
   tools:
-    python: 3.8
+    python: "3.8"
 
 python:
   install:
diff --git a/hftbacktest/__init__.py b/hftbacktest/__init__.py
index ef634c4..060b333 100644
--- a/hftbacktest/__init__.py
+++ b/hftbacktest/__init__.py
@@ -127,7 +127,7 @@
     'correct'
 )
 
-__version__ = '1.5.1'
+__version__ = '1.5.2'
 
 
 # JIT'ed latency models