diff --git a/.circleci/config.yml b/.circleci/config.yml
index 1a9a66a..054771a 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,8 +1,12 @@
-version: 2
+version: 2.1
+
+references:
+  circleci_docker_primary: &circleci_docker_primary trussworks/circleci-docker-primary:822fac1c30f3bb7d5d595bed5d2dc86265c4f2f0
+
 jobs:
   validate:
     docker:
-      - image: trussworks/circleci-docker-primary:683f06a3c6b20ba8696a09632c1c26a532df5bf5
+      - image: *circleci_docker_primary
     steps:
       - checkout
       - restore_cache:
@@ -17,7 +21,7 @@ jobs:
             - ~/.cache/pre-commit
 
 workflows:
-  version: 2
+  version: 2.1
   validate:
     jobs:
       - validate
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 99d1701..446edd5 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
   - repo: git://github.com/pre-commit/pre-commit-hooks
-    rev: v2.3.0
+    rev: v3.2.0
     hooks:
       - id: check-json
       - id: check-merge-conflict
@@ -12,12 +12,12 @@ repos:
       - id: trailing-whitespace
 
   - repo: git://github.com/igorshubovych/markdownlint-cli
-    rev: v0.21.0
+    rev: v0.23.2
     hooks:
       - id: markdownlint
 
   - repo: git://github.com/antonbabenko/pre-commit-terraform
-    rev: v1.25.0
+    rev: v1.31.0
     hooks:
       - id: terraform_docs
       - id: terraform_fmt
diff --git a/README.md b/README.md
index f5c7c33..01bc88f 100644
--- a/README.md
+++ b/README.md
@@ -37,13 +37,14 @@ module "rds-snapshot-cleaner" {
 
 | Name | Version |
 |------|---------|
-| terraform | >= 0.12 |
+| terraform | ~> 0.12.0 |
+| aws | ~> 2.70 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| aws | n/a |
+| aws | ~> 2.70 |
 
 ## Inputs
 
diff --git a/versions.tf b/versions.tf
index ac97c6a..d7ce6c1 100644
--- a/versions.tf
+++ b/versions.tf
@@ -1,4 +1,7 @@
-
 terraform {
-  required_version = ">= 0.12"
+  required_version = "~> 0.12.0"
+
+  required_providers {
+    aws = "~> 2.70"
+  }
 }