diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index abdd2b0..e8117ff 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -31,7 +31,7 @@ repos:
         exclude: ^causalnex/ebaybbn
 
 -   repo: https://github.com/psf/black
-    rev: stable
+    rev: 20.8b1
     hooks:
     -   id: black
 
diff --git a/RELEASE.md b/RELEASE.md
index e78fde7..12a65da 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -1,5 +1,7 @@
 # Upcoming release
 
+* Fixes cyclical import of `causalnex.plots`, as per #106.
+
 # Release 0.9.2
 * Remove Boston housing dataset from "sklearn tutorial", see #91 for more information.
 * Update pylint version to 2.7
diff --git a/causalnex/plots/plots.py b/causalnex/plots/plots.py
index 9cf72ca..904357f 100644
--- a/causalnex/plots/plots.py
+++ b/causalnex/plots/plots.py
@@ -33,11 +33,9 @@
 
 import networkx as nx
 
-from causalnex.structure.structuremodel import StructureModel
-
 
 def plot_structure(
-    sm: StructureModel,
+    sm: nx.DiGraph,
     prog: str = "neato",
     all_node_attributes: Dict[str, str] = None,
     all_edge_attributes: Dict[str, str] = None,
@@ -187,12 +185,12 @@ def color_gradient_string(from_color: str, to_color: str, steps: int) -> str:
 
 
 def _add_attributes(
-    sm: StructureModel,
+    sm: nx.DiGraph,
     all_node_attributes: Dict[str, str] = None,
     all_edge_attributes: Dict[str, str] = None,
     node_attributes: Dict[str, Dict[str, str]] = None,
     edge_attributes: Dict[str, Dict[str, str]] = None,
-) -> StructureModel:
+) -> nx.DiGraph:
     _sm = deepcopy(sm)
 
     # shift labels to be above nodes