diff --git a/CHANGELOG.md b/CHANGELOG.md
index 355ae4e..3d95abb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+### [1.5.1](https://github.com/M-Scott-Lassiter/Alphanumeric-Encoder/compare/v1.5.0...v1.5.1) (2022-05-14)
+
+
+### :lady_beetle: Bug Fixes
+
+* improve dictionary type checking ([3f37616](https://github.com/M-Scott-Lassiter/Alphanumeric-Encoder/commit/3f37616376682edeaeed59dfe66a606a61797de4)), closes [#39](https://github.com/M-Scott-Lassiter/Alphanumeric-Encoder/issues/39)
+
 ## [1.5.0](https://github.com/M-Scott-Lassiter/Alphanumeric-Encoder/compare/v1.4.0...v1.5.0) (2022-05-03)
 
 ### :gift: Feature Changes
diff --git a/package-lock.json b/package-lock.json
index bccfddc..a71cb92 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "alphanumeric-encoder",
-    "version": "1.5.0",
+    "version": "1.5.1",
     "lockfileVersion": 2,
     "requires": true,
     "packages": {
         "": {
             "name": "alphanumeric-encoder",
-            "version": "1.5.0",
+            "version": "1.5.1",
             "license": "MIT",
             "devDependencies": {
                 "@semantic-release/changelog": "^6.0.1",
diff --git a/package.json b/package.json
index 58243ef..55830dd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "alphanumeric-encoder",
-    "version": "1.5.0",
+    "version": "1.5.1",
     "description": "Encodes a number to a letter representation, or decodes it back",
     "keywords": [
         "alphanumeric",