diff --git a/requirements-lock.txt b/requirements-lock.txt
index 1a5ec1b..0a2e6f9 100644
--- a/requirements-lock.txt
+++ b/requirements-lock.txt
@@ -1,64 +1,10 @@
 aiosqlite==0.16.0
-antlr4-python3-runtime==4.9.2
-attrs==21.2.0
-bmt==0.6.0
-cachetools==4.2.2
-certifi==2021.5.30
-CFGraph==0.2.1
-chardet==4.0.0
+bmt-lite-1.8.2==1.0.2
 click==7.1.2
-Deprecated==1.2.12
-deprecation==2.1.0
 fastapi==0.65.2
-frozendict==2.0.3
-graphviz==0.16
-greenlet==1.1.0
 h11==0.12.0
-hbreader==0.9.1
-idna==2.10
-iniconfig==1.1.1
-isodate==0.6.0
-jsonasobj==1.3.1
-jsonasobj2==1.0.4
-jsonschema==3.2.0
-linkml==1.0.1
-linkml-model==1.0.0
-linkml-runtime==1.0.10
-lxml==4.6.3
-packaging==21.0
-parse==1.19.0
-pbr==5.6.0
-pluggy==0.13.1
-prefixcommons==0.1.9
-prologterms==0.0.6
-py==1.10.0
 pydantic==1.8.2
-PyJSG==0.11.6
-PyLD==2.0.3
-PyLDmod==2.0.5
-pyparsing==2.4.7
-pyrsistent==0.18.0
-PyShEx==0.7.20
-PyShExC==0.8.3
-pytest==6.2.4
-python-dateutil==2.8.1
-PyYAML==5.4.1
-rdflib==5.0.0
-rdflib-jsonld==0.5.0
-rdflib-pyldmod-compat==0.1.1
 reasoner-pydantic==1.1.2.1
-requests==2.25.1
-ShExJSG==0.7.1
-six==1.16.0
-sparqlslurper==0.4.1
-SPARQLWrapper==1.8.5
-SQLAlchemy==1.4.20
-starlette==0.13.6
-stringcase==1.2.0
-testfixtures==6.17.1
-toml==0.10.2
+starlette==0.14.2
 typing-extensions==3.10.0.0
-urllib3==1.26.6
 uvicorn==0.12.3
-watchdog==2.1.3
-wrapt==1.12.1
diff --git a/requirements.txt b/requirements.txt
index bb43f0e..70313c8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,5 @@
 aiosqlite==0.16.0
-bmt==0.6.0
-linkml-model==1.0.0
+bmt-lite-1.8.2==1.0.2
 fastapi==0.65.2
 reasoner-pydantic==1.1.2.1
 uvicorn==0.12.3
diff --git a/simple_kp/util.py b/simple_kp/util.py
index e1834de..4fdce71 100644
--- a/simple_kp/util.py
+++ b/simple_kp/util.py
@@ -3,9 +3,7 @@
 
 from bmt import Toolkit
 
-BMT = Toolkit(
-    schema="https://raw.githubusercontent.com/biolink/biolink-model/1.8.2/biolink-model.yaml",
-)
+BMT = Toolkit()
 
 
 def get_subcategories(category):