diff --git a/keyserver/.flowconfig b/keyserver/.flowconfig
index 6ca075561..e7485a395 100644
--- a/keyserver/.flowconfig
+++ b/keyserver/.flowconfig
@@ -1,44 +1,45 @@
 [ignore]
 <PROJECT_ROOT>/dist
 <PROJECT_ROOT>/node_modules/google-gax/node_modules/grpc/node_modules/protobufjs/src/bower.json
 .*/node_modules/protobufjs/src/bower.json
 .*/web/flow-typed
 
 [include]
 ../landing
 ../lib
 ../web
 
 [libs]
 ../lib/flow-typed
 ../web/flow-typed
 
 [options]
 enums=true
 
 module.file_ext=.js
 module.file_ext=.cjs
 module.file_ext=.json
 
 exact_by_default=true
 
 format.bracket_spacing=false
 
 [lints]
 sketchy-null-number=warn
 sketchy-null-mixed=warn
 sketchy-number=warn
 untyped-type-import=warn
 nonstrict-import=warn
 deprecated-type=warn
 unsafe-getters-setters=warn
 unnecessary-invariant=warn
+unused-promise=error
 
 [strict]
 deprecated-type
 nonstrict-import
 sketchy-null
 unclear-type
 unsafe-getters-setters
 untyped-import
 untyped-type-import
diff --git a/landing/.flowconfig b/landing/.flowconfig
index 69e92f893..e995effca 100644
--- a/landing/.flowconfig
+++ b/landing/.flowconfig
@@ -1,32 +1,33 @@
 [include]
 ../lib
 
 [libs]
 ../lib/flow-typed
 
 [options]
 module.name_mapper.extension='css' -> '<PROJECT_ROOT>/flow/CSSModule.js.flow'
 
 enums=true
 exact_by_default=true
 
 format.bracket_spacing=false
 
 [lints]
 sketchy-null-number=warn
 sketchy-null-mixed=warn
 sketchy-number=warn
 untyped-type-import=warn
 nonstrict-import=warn
 deprecated-type=warn
 unsafe-getters-setters=warn
 unnecessary-invariant=warn
+unused-promise=error
 
 [strict]
 deprecated-type
 nonstrict-import
 sketchy-null
 unclear-type
 unsafe-getters-setters
 untyped-import
 untyped-type-import
diff --git a/lib/.flowconfig b/lib/.flowconfig
index 9f698da1e..faf14e16c 100644
--- a/lib/.flowconfig
+++ b/lib/.flowconfig
@@ -1,31 +1,32 @@
 [ignore]
 
 [include]
 
 [libs]
 
 [options]
 enums=true
 
 exact_by_default=true
 
 format.bracket_spacing=false
 
 [lints]
 sketchy-null-number=warn
 sketchy-null-mixed=warn
 sketchy-number=warn
 untyped-type-import=warn
 nonstrict-import=warn
 deprecated-type=warn
 unsafe-getters-setters=warn
 unnecessary-invariant=warn
+unused-promise=error
 
 [strict]
 deprecated-type
 nonstrict-import
 sketchy-null
 unclear-type
 unsafe-getters-setters
 untyped-import
 untyped-type-import
diff --git a/native/.flowconfig b/native/.flowconfig
index b32b8a732..5216156f5 100644
--- a/native/.flowconfig
+++ b/native/.flowconfig
@@ -1,77 +1,78 @@
 [ignore]
 .*/node_modules/react-native-fs/FS.common.js
 .*/node_modules/react-native-gesture-handler/Swipeable.js
 .*/fbjs/lib/keyMirrorRecursive.js.flow
 
 ; Flow doesn't support platforms
 .*/Libraries/Utilities/LoadingView.js
 
 .*/node_modules/resolve/test/resolver/malformed_package_json/package\.json$
 .*/node_modules/module-deps/test/invalid_pkg/package.json
 
 .*/comm/web/.*
 .*/comm/keyserver/.*
 .*/comm/desktop/.*
 .*/comm/landing/.*
 .*/comm/services/electron-update-server/.*
 
 .*/android/app/build/.*
 
 [untyped]
 .*/node_modules/@react-native-community/cli/.*/.*
 
 [declarations]
 .*/node_modules/react-native-camera/*
 
 [include]
 ../node_modules
 ../lib
 
 [libs]
 ../node_modules/react-native/interface.js
 ../node_modules/react-native/flow/
 ../lib/flow-typed/
 
 [options]
 enums=true
 emoji=true
 exact_by_default=true
 
 format.bracket_spacing=false
 
 module.file_ext=.js
 module.file_ext=.json
 module.file_ext=.ios.js
 module.file_ext=.android.js
 
 munge_underscores=true
 
 module.name_mapper='^react-native/\(.*\)$' -> '<PROJECT_ROOT>/../node_modules/react-native/\1'
 module.name_mapper='^@?[./a-zA-Z0-9$_-]+\.\(bmp\|gif\|jpg\|jpeg\|png\|psd\|svg\|webp\|m4v\|mov\|mp4\|mpeg\|mpg\|webm\|aac\|aiff\|caf\|m4a\|mp3\|wav\|html\|pdf\)$' -> '<PROJECT_ROOT>/node_modules/react-native/Libraries/Image/RelativeImageStub'
 
 suppress_type=$FlowIssue
 suppress_type=$FlowFixMe
 suppress_type=$FlowFixMeProps
 suppress_type=$FlowFixMeState
 
 [lints]
 sketchy-null-number=warn
 sketchy-null-mixed=warn
 sketchy-number=warn
 untyped-type-import=warn
 nonstrict-import=warn
 deprecated-type=warn
 unsafe-getters-setters=warn
 unnecessary-invariant=warn
+unused-promise=error
 
 [strict]
 deprecated-type
 nonstrict-import
 sketchy-null
 unclear-type
 unsafe-getters-setters
 untyped-import
 untyped-type-import
 
 [version]
 ^0.202.0
diff --git a/services/electron-update-server/.flowconfig b/services/electron-update-server/.flowconfig
index 9d7b54c6c..8ad6a5543 100644
--- a/services/electron-update-server/.flowconfig
+++ b/services/electron-update-server/.flowconfig
@@ -1,23 +1,24 @@
 [options]
 enums=true
 exact_by_default=true
 format.bracket_spacing=false
 
 [lints]
 sketchy-null-number=warn
 sketchy-null-mixed=warn
 sketchy-number=warn
 untyped-type-import=warn
 nonstrict-import=warn
 deprecated-type=warn
 unsafe-getters-setters=warn
 unnecessary-invariant=warn
+unused-promise=error
 
 [strict]
 deprecated-type
 nonstrict-import
 sketchy-null
 unclear-type
 unsafe-getters-setters
 untyped-import
 untyped-type-import
diff --git a/web/.flowconfig b/web/.flowconfig
index 5ff6ba03e..af5ae7820 100644
--- a/web/.flowconfig
+++ b/web/.flowconfig
@@ -1,35 +1,36 @@
 [ignore]
 .*/opaque-ke-wasm
 
 [include]
 ../lib
 
 [libs]
 ../lib/flow-typed
 
 [options]
 module.name_mapper.extension='css' -> '<PROJECT_ROOT>/flow/CSSModule.js.flow'
 
 enums=true
 exact_by_default=true
 
 format.bracket_spacing=false
 
 [lints]
 sketchy-null-number=warn
 sketchy-null-mixed=warn
 sketchy-number=warn
 untyped-type-import=warn
 nonstrict-import=warn
 deprecated-type=warn
 unsafe-getters-setters=warn
 unnecessary-invariant=warn
+unused-promise=error
 
 [strict]
 deprecated-type
 nonstrict-import
 sketchy-null
 unclear-type
 unsafe-getters-setters
 untyped-import
 untyped-type-import