diff --git a/package.json b/package.json
index 57c3bf48..c15a6e46 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     "@babel/preset-typescript": "^7.28.5",
     "@babel/runtime": "^7.26.10",
     "@mll-lab/eslint-config": "^3.1.0",
-    "@mll-lab/eslint-plugin": "^1.3.4",
+    "@mll-lab/eslint-plugin": "^1.4.0",
     "@mll-lab/prettier-config": "^1.0.0",
     "@mll-lab/tsconfig": "^3.0.0",
     "@rollup/plugin-babel": "^6.0.4",
diff --git a/src/Collapse/SingleCollapse.tsx b/src/Collapse/SingleCollapse.tsx
index 858f51dc..0d6aa060 100644
--- a/src/Collapse/SingleCollapse.tsx
+++ b/src/Collapse/SingleCollapse.tsx
@@ -20,7 +20,7 @@ export function SingleCollapse({
   collapse,
   panel,
 }: SingleCollapseProps) {
-  const isControlled = collapse?.open !== undefined;
+  const isControlled = collapse?.open != null;
   if (isControlled) {
     return (
       <Collapse
diff --git a/src/ImageMap/ImageMap.tsx b/src/ImageMap/ImageMap.tsx
index 1085932c..d56e89e8 100644
--- a/src/ImageMap/ImageMap.tsx
+++ b/src/ImageMap/ImageMap.tsx
@@ -17,7 +17,7 @@ export function ImageMap(props: ImageMapProps) {
     props.onError?.(error);
   }
 
-  if (dimensions === null) {
+  if (dimensions == null) {
     return null;
   }
 
diff --git a/src/TecanDeckView/TecanDeckView.tsx b/src/TecanDeckView/TecanDeckView.tsx
index f0879eac..33199dc0 100644
--- a/src/TecanDeckView/TecanDeckView.tsx
+++ b/src/TecanDeckView/TecanDeckView.tsx
@@ -109,7 +109,7 @@ export function TecanDeckView({ labwares }: { labwares: TecanLabwares }) {
   }, []);
 
   React.useEffect(() => {
-    if (availableWidth === undefined) return;
+    if (availableWidth == null) return;
 
     const totalColumnOverhead = COLUMN_OVERHEAD * COLUMN_COUNT;
     const availableContentWidth =
diff --git a/yarn.lock b/yarn.lock
index c9d8a04b..b73be674 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2729,14 +2729,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@mll-lab/eslint-plugin@npm:^1.3.4":
-  version: 1.3.4
-  resolution: "@mll-lab/eslint-plugin@npm:1.3.4"
+"@mll-lab/eslint-plugin@npm:^1.4.0":
+  version: 1.4.0
+  resolution: "@mll-lab/eslint-plugin@npm:1.4.0"
   dependencies:
     "@typescript-eslint/experimental-utils": "npm:^5.62"
   peerDependencies:
     eslint: ^8.8.0
-  checksum: 10c0/228442c1ddaccf094e0fd4e2d7116fbbac29977d4ba12d7c4b435453f730a4a93c66c428f9df8afacb26bcd5e728ea51404a556b1f9bf4053243e1d68d3cbcdd
+  checksum: 10c0/695c1f8720a89418222c63f527e03a898eca8d325549685b40b52fe31ddd252517501aebf76effca003f7acada303bc6ca316845c16837b53800c89f57d44cc9
   languageName: node
   linkType: hard
 
@@ -2773,7 +2773,7 @@ __metadata:
     "@babel/runtime": "npm:^7.26.10"
     "@dnd-kit/core": "npm:^6.0.8"
     "@mll-lab/eslint-config": "npm:^3.1.0"
-    "@mll-lab/eslint-plugin": "npm:^1.3.4"
+    "@mll-lab/eslint-plugin": "npm:^1.4.0"
     "@mll-lab/js-utils": "npm:^2.41.0"
     "@mll-lab/prettier-config": "npm:^1.0.0"
     "@mll-lab/tsconfig": "npm:^3.0.0"