diff --git a/requirements.txt b/requirements.txt
index 299c07734..2448afe93 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ tables==3.6.1
 blosc==1.10.2
 
 # find first, C search in arrays
-py_find_1st==1.1.4
+py_find_1st==1.1.5
 
 # Load ticker files 30% faster
 python-rapidjson==1.0