diff --git a/loc_chain_app/pubspec.lock b/loc_chain_app/pubspec.lock
index dc141af..da38942 100644
--- a/loc_chain_app/pubspec.lock
+++ b/loc_chain_app/pubspec.lock
@@ -63,14 +63,14 @@ packages:
       name: fast_rsa
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.6"
+    version: "1.4.0-nullsafety.4"
   ffi:
     dependency: transitive
     description:
       name: ffi
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "1.0.0"
   file:
     dependency: transitive
     description:
@@ -84,7 +84,7 @@ packages:
       name: fixnum
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.10.11"
+    version: "1.0.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -134,35 +134,35 @@ packages:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.28"
+    version: "2.0.1"
   path_provider_linux:
     dependency: transitive
     description:
       name: path_provider_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.1+2"
+    version: "2.0.0"
   path_provider_macos:
     dependency: transitive
     description:
       name: path_provider_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.4+8"
+    version: "2.0.0"
   path_provider_platform_interface:
     dependency: transitive
     description:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.4"
+    version: "2.0.1"
   path_provider_windows:
     dependency: transitive
     description:
       name: path_provider_windows
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.4+3"
+    version: "2.0.0"
   platform:
     dependency: transitive
     description:
@@ -176,7 +176,7 @@ packages:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.3"
+    version: "2.0.0"
   process:
     dependency: transitive
     description:
@@ -190,7 +190,7 @@ packages:
       name: protobuf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.3"
+    version: "2.0.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -258,14 +258,14 @@ packages:
       name: win32
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.4+1"
+    version: "2.0.5"
   xdg_directories:
     dependency: transitive
     description:
       name: xdg_directories
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.2"
+    version: "0.2.0"
 sdks:
   dart: ">=2.12.0 <3.0.0"
-  flutter: ">=1.12.13+hotfix.5"
+  flutter: ">=1.20.0"
diff --git a/loc_chain_app/pubspec.yaml b/loc_chain_app/pubspec.yaml
index 63f9d83..a2ecffc 100644
--- a/loc_chain_app/pubspec.yaml
+++ b/loc_chain_app/pubspec.yaml
@@ -28,8 +28,8 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
-  path_provider: ^1.6.28
-  fast_rsa: ^1.1.4
+  path_provider: ^2.0.1
+  fast_rsa: ^1.4.0-nullsafety.4
 
 dev_dependencies:
   flutter_test: