diff --git a/packages/overlay/src/apply-max-size.ts b/packages/overlay/src/apply-max-size.ts
index deba701695..9e4c9122ac 100644
--- a/packages/overlay/src/apply-max-size.ts
+++ b/packages/overlay/src/apply-max-size.ts
@@ -10,39 +10,16 @@ OF ANY KIND, either express or implied. See the License for the specific languag
 governing permissions and limitations under the License.
 */
 
+import { ModifierArguments, Modifier } from '@popperjs/core/lib/types';
+
 const appliedSizeDefaults = new WeakMap();
 
-export const applyMaxSize = {
+export const applyMaxSize: Modifier<'applyMaxSize', Record<string, unknown>> = {
     name: 'applyMaxSize',
     enabled: true,
     phase: 'beforeWrite',
     requires: ['maxSize'],
-    fn({
-        state,
-    }: {
-        state: {
-            modifiersData: {
-                maxSize: {
-                    height: number;
-                };
-            };
-            elements: {
-                popper: HTMLElement;
-            };
-            rects: {
-                popper: {
-                    height: number;
-                };
-            };
-            styles: {
-                popper: {
-                    maxHeight: string;
-                    height: string;
-                    overflow: string;
-                };
-            };
-        };
-    }): void {
+    fn({ state }: ModifierArguments<Record<string, unknown>>): void {
         const { height: maxHeight } = state.modifiersData.maxSize;
         if (!appliedSizeDefaults.has(state.elements.popper)) {
             appliedSizeDefaults.set(
diff --git a/packages/overlay/src/popper-arrow-rotate.ts b/packages/overlay/src/popper-arrow-rotate.ts
index 4f891de21d..955054331c 100644
--- a/packages/overlay/src/popper-arrow-rotate.ts
+++ b/packages/overlay/src/popper-arrow-rotate.ts
@@ -56,7 +56,10 @@ function computeArrowRotateStylesFn(
     return;
 }
 
-export const computeArrowRotateStyles: Modifier<Record<string, unknown>> = {
+export const computeArrowRotateStyles: Modifier<
+    'computeArrowRotateStyles',
+    Record<string, unknown>
+> = {
     name: 'computeArrowRotateStyles',
     enabled: true,
     phase: 'beforeWrite',
diff --git a/yarn.lock b/yarn.lock
index 0d084b788d..431866932a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3203,9 +3203,9 @@
     parse5 "^5.1.1"
 
 "@popperjs/core@^2.2.2":
-  version "2.2.2"
-  resolved "https://registry.yarnpkg.com/@popperjs/core/-/core-2.2.2.tgz#2e254f5eb31f3abc35470060fb7116937d837739"
-  integrity sha512-LaSssaO8QHSAnRI4ZZB+jTD/hmndqOzwabDwKuySS1ME0pj+La6pV77i5CIQ61kVtz3pE13DhmkaYFGtrrCMeg==
+  version "2.4.4"
+  resolved "https://registry.yarnpkg.com/@popperjs/core/-/core-2.4.4.tgz#11d5db19bd178936ec89cd84519c4de439574398"
+  integrity sha512-1oO6+dN5kdIA3sKPZhRGJTfGVP4SWV6KqlMOwry4J3HfyD68sl/3KmG7DeYUzvN+RbhXDnv/D8vNNB8168tAMg==
 
 "@rollup/plugin-node-resolve@^7.1.1":
   version "7.1.3"
@@ -7778,9 +7778,9 @@ css-tree@1.0.0-alpha.39:
     source-map "^0.6.1"
 
 css-unit-converter@^1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/css-unit-converter/-/css-unit-converter-1.1.1.tgz#d9b9281adcfd8ced935bdbaba83786897f64e996"
-  integrity sha1-2bkoGtz9jO2TW9urqDeGiX9k6ZY=
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/css-unit-converter/-/css-unit-converter-1.1.2.tgz#4c77f5a1954e6dbff60695ecb214e3270436ab21"
+  integrity sha512-IiJwMC8rdZE0+xiEZHeru6YoONC4rfPMqGm2W85jMIbkFvv5nFTwJVFHam2eFrN6txmoUYFAFXiv8ICVeTO0MA==
 
 css-what@2.1:
   version "2.1.3"