diff --git a/src/core/operations/BlowfishDecrypt.mjs b/src/core/operations/BlowfishDecrypt.mjs
index 83236327..a80fdb2b 100644
--- a/src/core/operations/BlowfishDecrypt.mjs
+++ b/src/core/operations/BlowfishDecrypt.mjs
@@ -73,7 +73,7 @@ class BlowfishDecrypt extends Operation {
         if (key.length < 4 || key.length > 56) {
             throw new OperationError(`Invalid key length: ${key.length} bytes
 
-Blowfish's key length needs to between 4 and 56 bytes (32-448 bits).`);
+Blowfish's key length needs to be between 4 and 56 bytes (32-448 bits).`);
         }
 
         if (iv.length !== 8) {
diff --git a/src/core/operations/BlowfishEncrypt.mjs b/src/core/operations/BlowfishEncrypt.mjs
index ebf5e5c2..7d550d46 100644
--- a/src/core/operations/BlowfishEncrypt.mjs
+++ b/src/core/operations/BlowfishEncrypt.mjs
@@ -73,7 +73,7 @@ class BlowfishEncrypt extends Operation {
         if (key.length < 4 || key.length > 56) {
             throw new OperationError(`Invalid key length: ${key.length} bytes
     
-Blowfish's key length needs to between 4 and 56 bytes (32-448 bits).`);
+Blowfish's key length needs to be between 4 and 56 bytes (32-448 bits).`);
         }
 
         if (iv.length !== 8) {