diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 718d8668..95285a6d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -50,7 +50,7 @@ repos:
       hooks:
           - id: yamlfmt
     - repo: https://github.com/timothycrosley/isort
-      rev: 5.7.0
+      rev: 5.12.0
       hooks:
           - id: isort
     - repo: https://github.com/psf/black
@@ -58,7 +58,7 @@ repos:
       hooks:
           - id: black
             language_version: python3.8
-    - repo: https://gitlab.com/pycqa/flake8
+    - repo: https://github.com/pycqa/flake8
       rev: 3.8.4
       hooks:
           - id: flake8
diff --git a/programl/requirements.txt b/programl/requirements.txt
index db4d6937..28f0f482 100644
--- a/programl/requirements.txt
+++ b/programl/requirements.txt
@@ -1,5 +1,5 @@
 absl-py>=0.11.0
-dgl>=0.6.1,<=0.9.1
+dgl==1.1.1
 grpcio>=1.33.2
 networkx>=2.4
 numpy>=1.19.3
diff --git a/programl/transform_ops.py b/programl/transform_ops.py
index 6c76734b..420e1171 100644
--- a/programl/transform_ops.py
+++ b/programl/transform_ops.py
@@ -22,7 +22,7 @@
 
 import dgl
 import networkx as nx
-from dgl.heterograph import DGLHeteroGraph
+from dgl import DGLGraph
 from networkx.readwrite import json_graph as nx_json
 
 from programl.exceptions import GraphTransformError
@@ -168,7 +168,7 @@ def to_dgl(
     timeout: int = 300,
     executor: Optional[ExecutorLike] = None,
     chunksize: Optional[int] = None,
-) -> Union[DGLHeteroGraph, Iterable[DGLHeteroGraph]]:
+) -> Union[DGLGraph, Iterable[DGLGraph]]:
     """Convert one or more Program Graphs to `DGLGraphs
     <https://docs.dgl.ai/en/latest/api/python/dgl.DGLGraph.html#dgl.DGLGraph>`_.
 
@@ -201,7 +201,7 @@ def to_dgl(
     """
 
     def _run_one(nx_graph):
-        return dgl.DGLGraph(nx_graph)
+        return dgl.from_networkx(nx_graph)
 
     if isinstance(graphs, ProgramGraph):
         return _run_one(to_networkx(graphs))
diff --git a/tests/BUILD b/tests/BUILD
index 211ec444..ba238258 100644
--- a/tests/BUILD
+++ b/tests/BUILD
@@ -134,3 +134,13 @@ py_test(
         "//tests/plugins",
     ],
 )
+
+py_test(
+    name = "to_dgl_test",
+    srcs = ["to_dgl_test.py"],
+    deps = [
+        "//programl",
+        "//tests:test_main",
+        "//tests/plugins",
+    ],
+)
diff --git a/tests/to_dgl_test.py b/tests/to_dgl_test.py
new file mode 100644
index 00000000..371cca55
--- /dev/null
+++ b/tests/to_dgl_test.py
@@ -0,0 +1,32 @@
+import pytest
+from dgl import DGLGraph
+
+import programl as pg
+from tests.test_main import main
+
+pytest_plugins = ["tests.plugins.llvm_program_graph"]
+
+
+@pytest.fixture(scope="session")
+def graph() -> pg.ProgramGraph:
+    return pg.from_cpp("int A() { return 0; }")
+
+
+def test_to_dgl_simple_graph(graph: pg.ProgramGraph):
+    graphs = list(pg.to_dgl([graph]))
+    assert len(graphs) == 1
+    assert isinstance(graphs[0], DGLGraph)
+
+
+def test_to_dgl_simple_graph_single_input(graph: pg.ProgramGraph):
+    dgl_graph = pg.to_dgl(graph)
+    assert isinstance(dgl_graph, DGLGraph)
+
+
+def test_to_dgl_two_inputs(graph: pg.ProgramGraph):
+    graphs = list(pg.to_dgl([graph, graph]))
+    assert len(graphs) == 2
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tools/perf_monitor/requirements.txt b/tools/perf_monitor/requirements.txt
index c271188b..5fdaf887 100644
--- a/tools/perf_monitor/requirements.txt
+++ b/tools/perf_monitor/requirements.txt
@@ -1,2 +1,2 @@
 GPUtil==1.4.0
-psutil==5.4.5
+psutil==5.8.0