diff --git a/requirements.in b/requirements.in
index bc36b10..6483551 100644
--- a/requirements.in
+++ b/requirements.in
@@ -1,6 +1,6 @@
 marshmallow
 marshmallow-jsonschema
-numpy
+numpy<2
 jsonschema
 SQLAlchemy
 shapely
diff --git a/requirements.txt b/requirements.txt
index 4c0a7fa..de310ba 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ marshmallow==3.22.0
     #   marshmallow-jsonschema
 marshmallow-jsonschema==0.13.0
     # via -r requirements.in
-numpy==2.1.1
+numpy==1.26.4
     # via
     #   -r requirements.in
     #   pandas