diff --git a/experiment/container/example2/pubspec.yaml b/experiment/container/example2/pubspec.yaml
index fb79e1de..48d31108 100644
--- a/experiment/container/example2/pubspec.yaml
+++ b/experiment/container/example2/pubspec.yaml
@@ -2,7 +2,7 @@ name: example2
 version: 0.0.1
 description: Example 2.
 environment:
-  sdk: '>=2.19.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 dependencies:
   angel3_container: ^7.1.0-beta.1
   angel3_container_generator: ^7.1.0-beta.1
diff --git a/packages/container/angel_container/pubspec.yaml b/packages/container/angel_container/pubspec.yaml
index 43cf9ed0..1af76ca5 100644
--- a/packages/container/angel_container/pubspec.yaml
+++ b/packages/container/angel_container/pubspec.yaml
@@ -4,7 +4,7 @@ description: Angel3 hierarchical DI container, and pluggable backends for reflec
 homepage: https://angel3-framework.web.app/
 repository: https://github.com/dukefirehawk/angel/tree/master/packages/container/angel_container
 environment:
-  sdk: '>=2.19.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 dependencies:
   collection: ^1.17.0
   quiver: ^3.2.0
diff --git a/packages/container/angel_container_generator/pubspec.yaml b/packages/container/angel_container_generator/pubspec.yaml
index 548ebfad..527442ee 100644
--- a/packages/container/angel_container_generator/pubspec.yaml
+++ b/packages/container/angel_container_generator/pubspec.yaml
@@ -4,7 +4,7 @@ description: Codegen support for using pkg:reflectable with pkg:angel3_container
 homepage: https://angel3-framework.web.app/
 repository: https://github.com/dukefirehawk/angel/tree/master/packages/container/angel_container_generator
 environment:
-  sdk: '>=2.19.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 dependencies:
   angel3_container: ^7.1.0-beta.1
   reflectable: ^4.0.2
diff --git a/packages/orm/angel_orm_generator/pubspec.yaml b/packages/orm/angel_orm_generator/pubspec.yaml
index db670775..5c181b34 100644
--- a/packages/orm/angel_orm_generator/pubspec.yaml
+++ b/packages/orm/angel_orm_generator/pubspec.yaml
@@ -4,7 +4,7 @@ description: Code generators for Angel3 ORM. Generates query builder classes.
 homepage: https://angel3-framework.web.app/
 repository: https://github.com/dukefirehawk/angel/tree/master/packages/orm/angel_orm_generator
 environment:
-  sdk: '>=2.19.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 dependencies:
   angel3_model: ^7.0.0
   angel3_serialize: ^7.0.0
diff --git a/packages/orm/angel_orm_mysql/pubspec.yaml b/packages/orm/angel_orm_mysql/pubspec.yaml
index 001d43d8..1cd47353 100644
--- a/packages/orm/angel_orm_mysql/pubspec.yaml
+++ b/packages/orm/angel_orm_mysql/pubspec.yaml
@@ -4,7 +4,7 @@ description: MySQL support for Angel3 ORM. Includes functionality for querying a
 homepage: https://angel3-framework.web.app/
 repository: https://github.com/dukefirehawk/angel/tree/master/packages/orm/angel_orm_mysql
 environment:
-  sdk: '>=2.19.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 dependencies:
   angel3_orm: ^7.0.0
   logging: ^1.1.0
diff --git a/packages/orm/angel_orm_postgres/pubspec.yaml b/packages/orm/angel_orm_postgres/pubspec.yaml
index e07c7357..a0dbdea7 100644
--- a/packages/orm/angel_orm_postgres/pubspec.yaml
+++ b/packages/orm/angel_orm_postgres/pubspec.yaml
@@ -4,7 +4,7 @@ description: PostgreSQL support for Angel3 ORM. Includes functionality for query
 homepage: https://angel3-framework.web.app/
 repository: https://github.com/dukefirehawk/angel/tree/master/packages/orm/angel_orm_postgres
 environment:
-  sdk: '>=2.19.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 dependencies:
   angel3_orm: ^7.0.0
   logging: ^1.1.0
diff --git a/packages/orm/angel_orm_test/pubspec.yaml b/packages/orm/angel_orm_test/pubspec.yaml
index 1383943d..06d61f1b 100644
--- a/packages/orm/angel_orm_test/pubspec.yaml
+++ b/packages/orm/angel_orm_test/pubspec.yaml
@@ -4,7 +4,7 @@ description: Common tests for Angel3 ORM. Reference implmentation of the generat
 homepage: https://angel3-framework.web.app/
 repository: https://github.com/dukefirehawk/angel/tree/master/packages/orm/angel_orm_test
 environment:
-  sdk: '>=2.19.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 dependencies:
   angel3_migration: ^7.0.0
   angel3_model: ^7.0.0
diff --git a/packages/serialize/angel_serialize_generator/pubspec.yaml b/packages/serialize/angel_serialize_generator/pubspec.yaml
index 085e47a3..c3832bd7 100644
--- a/packages/serialize/angel_serialize_generator/pubspec.yaml
+++ b/packages/serialize/angel_serialize_generator/pubspec.yaml
@@ -4,7 +4,7 @@ description: Angel3 model serialization generators, designed for use with Angel.
 homepage: https://angel3-framework.web.app/
 repository: https://github.com/dukefirehawk/angel/tree/master/packages/serialize/angel_serialize_generator
 environment:
-  sdk: '>=2.19.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 dependencies:
   analyzer: ^5.0.0
   angel3_model: ^7.0.0