1diff --git a/README.md b/README.md
 2index 1e6600d..db16d81 100644
 3--- a/README.md
 4+++ b/README.md
 5@@ -7,6 +7,3 @@ Things I should do.
 6 ### Write documentation for Sheet
 7 
 8 ### Write documentation for Matrix
 9-
10-### Cell.error should not be of type any
11-Errors should have specific types so we can have type safety when passing them.
12\ No newline at end of file
13diff --git a/src/Cell.ts b/src/Cell.ts
14index 68d0c88..4de3544 100644
15--- a/src/Cell.ts
16+++ b/src/Cell.ts
17@@ -6,7 +6,7 @@ class Cell {
18   private formula: string;
19   private value: string;
20   private dependencies: Array<string>;
21-  private error: any;
22+  private error: string;
23   private id: string;
24   private row: number;
25   private col: number;
26@@ -109,15 +109,15 @@ class Cell {
27    * Set error for this cell. Usually in the case of a parse error when parsing the formula.
28    * @param error to set.
29    */
30-  setError(error: any) {
31+  setError(error: string) {
32     this.error = error;
33   }
34 
35   /**
36-   * Get the error for this cell. If the formula is parsed properly, or is null, this could be null.
37-   * @returns {any} error to return, could be Null.
38+   * Get the error for this cell. If the formula is not parsed properly, or is null, this could be null.
39+   * @returns {string} error to return, could be null.
40    */
41-  getError() : any {
42+  getError() : string {
43     return this.error;
44   }
45 
46@@ -128,9 +128,9 @@ class Cell {
47    */
48   getRenderedValue() : string {
49     if (this.error !== null) {
50-      return this.value.toString();
51+      return this.value;
52     }
53-    return this.error.toString();
54+    return this.error;
55   }
56 
57   /**