diff --git a/dependencies/CASE-unstable b/dependencies/CASE-unstable
index 39cdb04c..5e236bd4 160000
--- a/dependencies/CASE-unstable
+++ b/dependencies/CASE-unstable
@@ -1 +1 @@
-Subproject commit 39cdb04c0fa657456d587682eb6e3a36f97a11c0
+Subproject commit 5e236bd432f90d6d507c8fd3c694708f66498291
diff --git a/dependencies/CASE-unstable-2.0.0 b/dependencies/CASE-unstable-2.0.0
index 2d2216a5..6e572348 160000
--- a/dependencies/CASE-unstable-2.0.0
+++ b/dependencies/CASE-unstable-2.0.0
@@ -1 +1 @@
-Subproject commit 2d2216a597a120220846f53d2092aab32e147a91
+Subproject commit 6e572348e2f1e06eda7d6d724e1ffc9b98ff7696
diff --git a/ontology/CASE-unstable-2.0.0.ttl b/ontology/CASE-unstable-2.0.0.ttl
index 024984e3..953f7973 100644
--- a/ontology/CASE-unstable-2.0.0.ttl
+++ b/ontology/CASE-unstable-2.0.0.ttl
@@ -1056,6 +1056,8 @@ action:Action
 	rdfs:subClassOf core:Perdurant ;
 	rdfs:label "Action"@en ;
 	rdfs:comment "An action is something that may be done or performed."@en ;
+	rdfs:isDefinedBy <https://ontology.unifiedcyberontology.org/uco/types> ;
+	owl:disjointWith core:Event ;
 	sh:property
 		[
 			sh:class action:Action ;
@@ -1166,6 +1168,20 @@ action:Action
 	sh:targetClass action:Action ;
 	.
 
+action:Action-disjointWith-Event-shape
+	a sh:NodeShape ;
+	sh:message "action:Action and core:event are disjoint classes."@en ;
+	sh:node [
+		a sh:NodeShape ;
+		rdfs:comment "This blank node is provided to avoid a SHACL multiple-inheritance issue."@en ;
+		sh:not [
+			a sh:NodeShape ;
+			sh:class core:Event ;
+		] ;
+	] ;
+	sh:targetClass action:Action ;
+	.
+
 action:ActionArgumentFacet
 	a
 		owl:Class ,
@@ -2081,6 +2097,7 @@ core:Event
 	rdfs:subClassOf core:Perdurant ;
 	rdfs:label "Event"@en ;
 	rdfs:comment "An Event is a noteworthy occurrence (something that happens or might happen)."@en ;
+	owl:disjointWith action:Action ;
 	sh:property
 		[
 			sh:class core:UcoObject ;
diff --git a/ontology/CASE-unstable.ttl b/ontology/CASE-unstable.ttl
index 8a200e70..7d14b0ab 100644
--- a/ontology/CASE-unstable.ttl
+++ b/ontology/CASE-unstable.ttl
@@ -1056,6 +1056,8 @@ action:Action
 	rdfs:subClassOf core:UcoObject ;
 	rdfs:label "Action"@en ;
 	rdfs:comment "An action is something that may be done or performed."@en ;
+	rdfs:isDefinedBy <https://ontology.unifiedcyberontology.org/uco/types> ;
+	owl:disjointWith core:Event ;
 	sh:property
 		[
 			sh:class action:Action ;
@@ -1166,6 +1168,20 @@ action:Action
 	sh:targetClass action:Action ;
 	.
 
+action:Action-disjointWith-Event-shape
+	a sh:NodeShape ;
+	sh:message "action:Action and core:event are disjoint classes."@en ;
+	sh:node [
+		a sh:NodeShape ;
+		rdfs:comment "This blank node is provided to avoid a SHACL multiple-inheritance issue."@en ;
+		sh:not [
+			a sh:NodeShape ;
+			sh:class core:Event ;
+		] ;
+	] ;
+	sh:targetClass action:Action ;
+	.
+
 action:ActionArgumentFacet
 	a
 		owl:Class ,
@@ -2061,6 +2077,7 @@ core:Event
 	rdfs:subClassOf core:UcoObject ;
 	rdfs:label "Event"@en ;
 	rdfs:comment "An Event is a noteworthy occurrence (something that happens or might happen)."@en ;
+	owl:disjointWith action:Action ;
 	sh:property
 		[
 			sh:class core:UcoObject ;