diff --git a/src/components/auth/GoogleAuthButton.tsx b/src/components/auth/GoogleAuthButton.tsx
index b6bddab9e..8be062b2d 100644
--- a/src/components/auth/GoogleAuthButton.tsx
+++ b/src/components/auth/GoogleAuthButton.tsx
@@ -87,8 +87,6 @@ const GoogleAuthButton = ({
         size="large"
         variant="tertiary"
         onClick={async () => {
-          // Ignored because error received here is a 500, and is not well formated for this use case
-          // @ts-ignore
           const { data, errors } = await getGoogleUrl()
 
           // Note: keep underscore notation for some error codes
diff --git a/src/components/designSystem/Avatar.tsx b/src/components/designSystem/Avatar.tsx
index 4657f056e..38142a8ef 100644
--- a/src/components/designSystem/Avatar.tsx
+++ b/src/components/designSystem/Avatar.tsx
@@ -52,12 +52,9 @@ const getBackgroundColorKey = (identifier?: string): keyof typeof colors.avatar
     return acc
   }, 0)
 
-  // From the modulo of the color number, get the modulo
-  const colorKeys = Object.keys(colors.avatar)
-
+  const colorKeys = Object.keys(colors.avatar) as Array<keyof typeof colors.avatar>
   const colorIndex = charcodeSum % colorKeys.length
 
-  // @ts-expect-error
   return colorKeys[colorIndex]
 }
 
diff --git a/src/components/designSystem/Popper.tsx b/src/components/designSystem/Popper.tsx
index 1402670fe..cfeb3e79a 100644
--- a/src/components/designSystem/Popper.tsx
+++ b/src/components/designSystem/Popper.tsx
@@ -95,8 +95,9 @@ export const Popper = forwardRef<PopperRef, PopperProps>(
                 },
                 ref: openerRef,
               })
-            : // @ts-expect-error
-              cloneElement(opener, { onClick: toggle, ref: openerRef })}
+            : !!opener
+              ? cloneElement(opener, { onClick: toggle, ref: openerRef })
+              : null}
           <MuiPopper
             className={tw(displayInDialog ? 'z-dialog' : 'z-popper')}
             style={{ minWidth: `${minWidth ?? openerRef?.current?.offsetWidth ?? 0}px` }}
diff --git a/src/components/designSystem/Toasts/Toast.tsx b/src/components/designSystem/Toasts/Toast.tsx
index 2b598c3b0..52628ff50 100644
--- a/src/components/designSystem/Toasts/Toast.tsx
+++ b/src/components/designSystem/Toasts/Toast.tsx
@@ -19,7 +19,7 @@ interface ToastRef {
 const AUTO_DISMISS_TIME = 6000
 
 const containerStyles = cva(
-  'mt-4 box-border flex max-h-[300px] w-fit max-w-[360px] animate-enter items-center justify-start overflow-hidden rounded-xl px-4 py-3 text-white transition-all delay-[0ms] duration-[250ms] ease-in-out',
+  'mt-4 box-border flex max-h-[300px] w-fit max-w-[360px] animate-enter items-center justify-start overflow-hidden rounded-xl px-4 py-3 text-white transition-all delay-[0ms] duration-250 ease-in-out',
   {
     variants: {
       severity: {
@@ -33,7 +33,7 @@ const containerStyles = cva(
 
 export const Toast = forwardRef<ToastRef, ToastProps>(({ toast }: ToastProps, ref) => {
   const [closing, setClosing] = useState(false)
-  const timeoutRef = useRef(null)
+  const timeoutRef = useRef<NodeJS.Timeout | null>(null)
   const { translate } = useInternationalization()
   const { id, severity = ToastSeverityEnum.info, autoDismiss = true, message, translateKey } = toast
 
@@ -41,7 +41,6 @@ export const Toast = forwardRef<ToastRef, ToastProps>(({ toast }: ToastProps, re
     (time = AUTO_DISMISS_TIME) => {
       if (!autoDismiss) return
 
-      // @ts-expect-error
       timeoutRef.current = setTimeout(() => {
         setClosing(true)
       }, time)
diff --git a/src/components/plans/ChargeAccordion.tsx b/src/components/plans/ChargeAccordion.tsx
index 0765823f4..a85916171 100644
--- a/src/components/plans/ChargeAccordion.tsx
+++ b/src/components/plans/ChargeAccordion.tsx
@@ -232,7 +232,6 @@ export const ChargeAccordion = memo(
         hasDefaultPropertiesErrors:
           typeof chargeErrors === 'object' &&
           typeof chargeErrors[index] === 'object' &&
-          // @ts-ignore
           typeof chargeErrors[index].properties === 'object',
         hasErrorInCharges: Boolean(chargeErrors && chargeErrors[index]),
         initialLocalCharge: formikProps.initialValues.charges[index],
diff --git a/src/core/serializers/serializePlanInput.ts b/src/core/serializers/serializePlanInput.ts
index 58706a114..997098e43 100644
--- a/src/core/serializers/serializePlanInput.ts
+++ b/src/core/serializers/serializePlanInput.ts
@@ -43,7 +43,7 @@ const serializeProperties = (properties: Properties, chargeModel: ChargeModelEnu
   return {
     ...properties,
     ...([ChargeModelEnum.Standard, ChargeModelEnum.Dynamic].includes(chargeModel)
-      ? // @ts-ignore EDIT: groupedBy is a string at this stage. need to send string[] to BE
+      ? // @ts-expect-error EDIT: groupedBy is a string at this stage. need to send string[] to BE
         { groupedBy: !!properties?.groupedBy ? properties?.groupedBy.split(',') : undefined }
       : { groupedBy: undefined }),
     ...([ChargeModelEnum.Package, ChargeModelEnum.Standard].includes(chargeModel)