diff --git a/devtools/conda-envs/canary_env.yaml b/devtools/conda-envs/canary_env.yaml
index 766186a..89771b4 100644
--- a/devtools/conda-envs/canary_env.yaml
+++ b/devtools/conda-envs/canary_env.yaml
@@ -4,6 +4,8 @@ channels:
 dependencies:
   - python
   - pip
+  # Remove when in a release: https://github.com/openforcefield/openff-interchange/issues/1403
+  - numpy <2.4
   - pytest
   - openff-toolkit >=0.17.0
   - openmmforcefields
diff --git a/devtools/conda-envs/test_env.yaml b/devtools/conda-envs/test_env.yaml
index d315d48..ae4e240 100644
--- a/devtools/conda-envs/test_env.yaml
+++ b/devtools/conda-envs/test_env.yaml
@@ -4,6 +4,8 @@ channels:
 dependencies:
   - python
   - pip
+  # Remove when in a release: https://github.com/openforcefield/openff-interchange/issues/1403
+  - numpy <2.4
   - openff-toolkit >=0.17.0
   - openff-interchange >=0.3.17
   - pytest
diff --git a/devtools/conda-envs/test_no_toolkit.yaml b/devtools/conda-envs/test_no_toolkit.yaml
index 62f75fb..a8dfd41 100644
--- a/devtools/conda-envs/test_no_toolkit.yaml
+++ b/devtools/conda-envs/test_no_toolkit.yaml
@@ -4,6 +4,8 @@ channels:
 dependencies:
   - python
   - pip
+  # Remove when in a release: https://github.com/openforcefield/openff-interchange/issues/1403
+  - numpy <2.4
   - pytest
   - pytest-cov
   - pytest-xdist