diff --git a/.github/workflows/ghostbuster.yml b/.github/workflows/ghostbuster.yml
index d27d116b634ad8..757cb932ac6f22 100644
--- a/.github/workflows/ghostbuster.yml
+++ b/.github/workflows/ghostbuster.yml
@@ -47,7 +47,7 @@ jobs:
           fi
 
       - if: ${{ inputs.skipPR != 'true' }}
-        uses: peter-evans/create-pull-request@v4.0.3
+        uses: peter-evans/create-pull-request@v4.0.4
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           commit-message: "Remove contributors with deleted accounts #no-publishing-comment"
diff --git a/types/math-expression-evaluator/index.d.ts b/types/math-expression-evaluator/index.d.ts
index 61ac6bdb175758..c04409995b5779 100644
--- a/types/math-expression-evaluator/index.d.ts
+++ b/types/math-expression-evaluator/index.d.ts
@@ -1,6 +1,7 @@
-// Type definitions for math-expression-evaluator 1.2
+// Type definitions for math-expression-evaluator 1.3
 // Project: https://github.com/bugwheels94/math-expression-evaluator
 // Definitions by: DefinitelyTyped <https://github.com/DefinitelyTyped>
+// Definitions by: Adam Zerella <https://github.com/azerella>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 interface Token {
@@ -9,13 +10,36 @@ interface Token {
     value?: string|((a: number, b?: number) => number) | undefined;
     show: string;
     preced?: number | undefined;
+    numberOfArguments?: number;
 }
 
+type TokenName =
+    | 'FUNCTION_WITH_ONE_ARG'
+    | 'NUMBER'
+    | 'BINARY_OPERATOR_HIGH_PRECENDENCE'
+    | 'CONSTANT'
+    | 'OPENING_PARENTHESIS'
+    | 'CLOSING_PARENTHESIS'
+    | 'DECIMAL'
+    | 'POSTFIX_FUNCTION_WITH_ONE_ARG'
+    | 'FUNCTION_WITH_N_ARGS'
+    | 'BINARY_OPERATOR_LOW_PRECENDENCE'
+    | 'BINARY_OPERATOR_PERMUTATION'
+    | 'COMMA'
+    | 'EVALUATED_FUNCTION'
+    | 'EVALUATED_FUNCTION_PARAMETER'
+    | 'SPACE';
+
+type TokenTypes = {
+    [K in TokenName]: number;
+};
+
 declare class Mexp {
     static lex(inp: string, tokens?: Token[]): Mexp;
     formulaEval(): Mexp;
     toPostfix(): Mexp;
     postfixEval(pair?: object): number|string;
+    static tokenTypes: TokenTypes;
     static eval(exp: string, tokens?: Token[], pair?: object): string;
     static eval(exp: string, mexp?: object): string;
     static addToken(tokens: Token[]): void;
diff --git a/types/math-expression-evaluator/math-expression-evaluator-tests.ts b/types/math-expression-evaluator/math-expression-evaluator-tests.ts
index 5af0a9d761bc06..514f387e8dcbc2 100644
--- a/types/math-expression-evaluator/math-expression-evaluator-tests.ts
+++ b/types/math-expression-evaluator/math-expression-evaluator-tests.ts
@@ -30,6 +30,17 @@ Mexp.addToken([{
     preced: 11,
     token: "mexp"
 }]);
+
+Mexp.addToken([{
+    type: Mexp.tokenTypes.FUNCTION_WITH_N_ARGS,
+    token: 'maxof5',
+    show: 'maxof5',
+    numberOfArguments: 5,
+    value: function (a, b) {
+        return Math.max.apply(Math, [a, b])
+    },
+}]);
+
 Mexp.lex("mexp3").toPostfix().postfixEval();
 
 Mexp.lex('mexp3').toPostfix();