diff --git a/pyproject.toml b/pyproject.toml
index c922b9bd..87111848 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -110,7 +110,7 @@ include-package-data = false
 package-dir = {"" = "src"}
 
 [tool.setuptools.package-data]
-"polarimetry.data" = [
+"polarimetry.lhcb" = [
     "model-definitions.yaml",
     "particle-definitions.yaml",
 ]
diff --git a/src/polarimetry/data/model-definitions.yaml b/src/polarimetry/lhcb/model-definitions.yaml
similarity index 100%
rename from src/polarimetry/data/model-definitions.yaml
rename to src/polarimetry/lhcb/model-definitions.yaml
diff --git a/src/polarimetry/data/particle-definitions.yaml b/src/polarimetry/lhcb/particle-definitions.yaml
similarity index 100%
rename from src/polarimetry/data/particle-definitions.yaml
rename to src/polarimetry/lhcb/particle-definitions.yaml
diff --git a/src/polarimetry/lhcb/particle.py b/src/polarimetry/lhcb/particle.py
index cee35d33..72c23a19 100644
--- a/src/polarimetry/lhcb/particle.py
+++ b/src/polarimetry/lhcb/particle.py
@@ -74,7 +74,7 @@ class ResonanceJSON(TypedDict):
 
 
 __PARTICLE_DATABASE = load_particles(
-    Path(__file__).parent.parent / "data/particle-definitions.yaml"
+    Path(__file__).parent.parent / "lhcb/particle-definitions.yaml"
 )
 
 Λc = __PARTICLE_DATABASE["Lambda_c+"]