diff --git a/.eslintrc.js b/.eslintrc.js
index 01b4ac33..042057ec 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -18,6 +18,7 @@ module.exports = {
     '@typescript-eslint/no-unused-vars': ['error'],
     // 'spaced-comment': ['error', 'always', { markers: ['#region'], exceptions: ['#endregion'] }],
     'quote-props': ['error', 'consistent-as-needed'],
+    '@typescript-eslint/strict-boolean-expressions': 'off',
     // '@typescript-eslint/no-use-before-define': 'off',
     // 'vue/no-mutating-props': 'off',
     // '@typescript-eslint/member-delimiter-style': 'off',
@@ -27,7 +28,7 @@ module.exports = {
     // 'vue/no-deprecated-filter': 'off',
     // 'vue/no-deprecated-slot-attribute': 'off',
     // 'no-unused-vars': 'off',
-    // '@typescript-eslint/no-non-null-assertion': 'off'
+    '@typescript-eslint/no-non-null-assertion': 'off'
   },
   parserOptions: {
     parser: '@typescript-eslint/parser',
diff --git a/src/web/map-check/WidgetMapCheck.vue b/src/web/map-check/WidgetMapCheck.vue
index d6e42691..87dac2e6 100644
--- a/src/web/map-check/WidgetMapCheck.vue
+++ b/src/web/map-check/WidgetMapCheck.vue
@@ -88,7 +88,7 @@ export default defineComponent({
     const mapStats = computed(() => {
       return prepareMapStats(item.value!)
     })
-    const image = computed (() => {
+    const image = computed(() => {
       if (!item.value) return undefined
 
       const entry = mapName.value && MAP_IMGS.get(mapName.value)
diff --git a/src/web/price-check/filters/FilterModifierAnointment.vue b/src/web/price-check/filters/FilterModifierAnointment.vue
index 18d4a629..6ab76e1a 100644
--- a/src/web/price-check/filters/FilterModifierAnointment.vue
+++ b/src/web/price-check/filters/FilterModifierAnointment.vue
@@ -50,6 +50,6 @@ export default defineComponent({
     return {
       result
     }
-  }  
+  }
 })
 </script>
diff --git a/src/web/price-check/filters/FilterName.vue b/src/web/price-check/filters/FilterName.vue
index b58cfe66..922ed318 100644
--- a/src/web/price-check/filters/FilterName.vue
+++ b/src/web/price-check/filters/FilterName.vue
@@ -30,7 +30,7 @@ export default defineComponent({
       required: true
     }
   },
-  setup (props, ctx) {
+  setup (props) {
     const { t } = useI18n()
 
     const label = computed(() => {
diff --git a/src/web/price-check/filters/unique-roll.ts b/src/web/price-check/filters/unique-roll.ts
index 5b397cff..6432c62e 100644
--- a/src/web/price-check/filters/unique-roll.ts
+++ b/src/web/price-check/filters/unique-roll.ts
@@ -6,7 +6,7 @@ import { StatFilter } from './interfaces'
 import { getRollAsSingleNumber } from '@/parser/utils'
 import { Config } from '@/web/Config'
 
-function isConstantMod (mod: UniqueItem['stats'][0]) {
+function isConstantMod (mod: UniqueItem['stats'][0]): boolean {
   return mod.bounds.every(b => b.min === b.max)
 }
 
@@ -23,7 +23,7 @@ export function uniqueModFilterPartial (
   mod: ItemModifier,
   filter: Writeable<StatFilter>
 ): void {
-  const uniqueInfo = UNIQUES.get(`${item.name} ${item.baseType}`)
+  const uniqueInfo = UNIQUES.get(`${item.name} ${item.baseType!}`)
   if (!uniqueInfo) return fallbackToExact(mod, filter)
 
   const modInfo = uniqueInfo.stats.find(stat =>
@@ -63,7 +63,7 @@ export function uniqueModFilterPartial (
   }
 }
 
-function fallbackToExact (mod: ItemModifier, filter: Writeable<StatFilter>) {
+function fallbackToExact (mod: ItemModifier, filter: Writeable<StatFilter>): void {
   if (mod.values) {
     filter.roll = getRollAsSingleNumber(mod.values)
     filter.defaultMin = filter.roll
diff --git a/src/web/price-check/filters/util.ts b/src/web/price-check/filters/util.ts
index 79ce282d..61d375bf 100644
--- a/src/web/price-check/filters/util.ts
+++ b/src/web/price-check/filters/util.ts
@@ -2,14 +2,14 @@ import { StatFilter } from './interfaces'
 import { rollCountDecimals } from '@/parser/utils'
 import { Config } from '@/web/Config'
 
-function percentRoll (value: number, p: number, method: Math['floor'] | Math['ceil'], decimals?: number) {
+function percentRoll (value: number, p: number, method: Math['floor'] | Math['ceil'], decimals?: number): number {
   const res = value + value * p / 100
 
   const rounding = Math.pow(10, decimals != null ? decimals : rollCountDecimals(value))
   return method((res + Number.EPSILON) * rounding) / rounding
 }
 
-export function percentRollDelta (value: number, delta: number, p: number, method: Math['floor'] | Math['ceil']) {
+export function percentRollDelta (value: number, delta: number, p: number, method: Math['floor'] | Math['ceil']): number {
   const res = value + delta * p / 100
 
   const rounding = Math.pow(10, rollCountDecimals(value))
@@ -18,10 +18,8 @@ export function percentRollDelta (value: number, delta: number, p: number, metho
 
 export function rollToFilter (
   roll: number,
-  opts?: {
-    neverNegated?: true
-    decimals?: number
-}): Pick<StatFilter, 'roll' | 'min' | 'max' | 'defaultMin' | 'defaultMax'> {
+  opts?: { neverNegated?: true, decimals?: number }
+): Pick<StatFilter, 'roll' | 'min' | 'max' | 'defaultMin' | 'defaultMax'> {
   const percent = Config.store.searchStatRange
 
   // opts.neverNegated is false only in one case, but keep it
diff --git a/src/web/price-check/price-prediction/poeprices.ts b/src/web/price-check/price-prediction/poeprices.ts
index 6a9d8ef4..2d9afc83 100644
--- a/src/web/price-check/price-prediction/poeprices.ts
+++ b/src/web/price-check/price-prediction/poeprices.ts
@@ -55,7 +55,7 @@ export async function requestPoeprices (item: ParsedItem): Promise<RareItemPrice
   }
 }
 
-export function getExternalLink (item: ParsedItem) {
+export function getExternalLink (item: ParsedItem): string {
   const query = stringify({
     i: Buffer.from(item.rawText).toString('base64'),
     l: league.value,
@@ -69,7 +69,7 @@ export async function sendFeedback (
   feedback: { text: string, option: 'fair' | 'low' | 'high' },
   prediction: { min: number, max: number, currency: 'chaos' | 'exalt' },
   item: ParsedItem
-) {
+): Promise<void> {
   const body = new FormData()
   body.append('selector', feedback.option)
   body.append('feedbacktxt', feedback.text)
diff --git a/src/web/price-check/trade/common.ts b/src/web/price-check/trade/common.ts
index 7f144a67..ed19ce9e 100644
--- a/src/web/price-check/trade/common.ts
+++ b/src/web/price-check/trade/common.ts
@@ -24,7 +24,7 @@ export interface SearchResult {
 }
 
 export function apiToSatisfySearch (item: ParsedItem, stats: StatFilter[]): 'trade' | 'bulk' {
-  if (stats.some(s => s.disabled === false)) {
+  if (stats.some(s => !s.disabled)) {
     return 'trade'
   }
 
@@ -54,7 +54,7 @@ const ENDPOINT_BY_LANG = {
   ru: 'ru.pathofexile.com'
 }
 
-export function getTradeEndpoint () {
+export function getTradeEndpoint (): string {
   return ENDPOINT_BY_LANG[Config.store.language]
 }
 
@@ -71,7 +71,7 @@ export const RATE_LIMIT_RULES = {
   ]
 }
 
-export function adjustRateLimits (clientLimits: RateLimiter[], headers: Headers) {
+export function adjustRateLimits (clientLimits: RateLimiter[], headers: Headers): RateLimiter[] {
   if (!headers.has('x-rate-limit-rules')) return clientLimits
 
   const rules = headers.get('x-rate-limit-rules')!.split(',')
@@ -83,7 +83,7 @@ export function adjustRateLimits (clientLimits: RateLimiter[], headers: Headers)
   )
 }
 
-function _adjustRateLimits (clientLimits: RateLimiter[], limitStr: string, stateStr: string) { /* eslint-disable no-console */
+function _adjustRateLimits (clientLimits: RateLimiter[], limitStr: string, stateStr: string): RateLimiter[] { /* eslint-disable no-console */
   const DEBUG = false
   const DESYNC_FIX = 0
 
@@ -137,6 +137,7 @@ function _adjustRateLimits (clientLimits: RateLimiter[], limitStr: string, state
     DEBUG && console.log('Add', rl.toString())
 
     Array(serverLimit.state).fill(undefined).forEach(() => {
+      // eslint-disable-next-line @typescript-eslint/no-floating-promises
       rl.wait()
     })
   }