diff --git a/raster_api/runtime/setup.py b/raster_api/runtime/setup.py
index 28f92b43..d2860fc8 100644
--- a/raster_api/runtime/setup.py
+++ b/raster_api/runtime/setup.py
@@ -7,7 +7,7 @@
 
 inst_reqs = [
     "boto3",
-    "rio-tiler==7.2.2",
+    "rio-tiler==6.5.0",
     "titiler.pgstac==1.3.0",
     "titiler.core>=0.18.5,<0.19",
     "titiler.mosaic>=0.18.5,<0.19",
diff --git a/raster_api/runtime/src/cmap_data/README.md b/raster_api/runtime/src/cmap_data/README.md
index 2377adca..b86363a6 100644
--- a/raster_api/runtime/src/cmap_data/README.md
+++ b/raster_api/runtime/src/cmap_data/README.md
@@ -115,7 +115,7 @@ np.save("soil_texture.npy", cmap)
 
 ```python
 from rio_tiler.colormap import parse_color
-import json
+import numpy as np
 
 # Colormap for Enhanced Fujita (EF) scale ratings
 tornado_ef_scale = {
@@ -128,7 +128,10 @@ tornado_ef_scale = {
     "5": "#ff00ff"
 }
 
-cmap = {int(i):parse_color(tornado_ef_scale[i]) for i in tornado_ef_scale}
+cmap = np.zeros((256, 4), dtype=np.uint8)
+cmap[:] = np.array([0, 0, 0, 255])
+for k in tornado_ef_scale.keys():
+    cmap[int(k)] = np.array(parse_color(tornado_ef_scale[k]))
 
-with open('tornado_ef_scale.json', 'w') as f:
-    json.dump(cmap, f)
\ No newline at end of file
+np.save("tornadoes.npy", cmap)
+```
\ No newline at end of file
diff --git a/raster_api/runtime/src/cmap_data/tornado_ef_scale.json b/raster_api/runtime/src/cmap_data/tornado_ef_scale.json
deleted file mode 100644
index f6d9c9d6..00000000
--- a/raster_api/runtime/src/cmap_data/tornado_ef_scale.json
+++ /dev/null
@@ -1 +0,0 @@
-{"-1": [179, 188, 201, 255], "0": [173, 216, 230, 255], "1": [144, 238, 144, 255], "2": [255, 231, 31, 255], "3": [255, 165, 0, 255], "4": [255, 0, 0, 255], "5": [255, 0, 255, 255]}
\ No newline at end of file
diff --git a/raster_api/runtime/src/cmap_data/tornadoes.npy b/raster_api/runtime/src/cmap_data/tornadoes.npy
new file mode 100644
index 00000000..85dee39a
Binary files /dev/null and b/raster_api/runtime/src/cmap_data/tornadoes.npy differ
diff --git a/raster_api/runtime/src/dependencies.py b/raster_api/runtime/src/dependencies.py
index 1e97d3cf..cee0a08b 100644
--- a/raster_api/runtime/src/dependencies.py
+++ b/raster_api/runtime/src/dependencies.py
@@ -10,9 +10,8 @@
     # Try backported to PY<39 `importlib_resources`.
     from importlib_resources import files as resources_files  # type: ignore
 
-
 VEDA_CMAPS_FILES = {
-    f.stem: str(f) for f in (resources_files(__package__) / "cmap_data").glob("*.[npy json]*")  # type: ignore
+    f.stem: str(f) for f in (resources_files(__package__) / "cmap_data").glob("*.npy")  # type: ignore
 }
 cmap = default_cmap.register(VEDA_CMAPS_FILES)
 ColorMapParams = create_colormap_dependency(cmap)