diff --git a/src/main/java/com/mattrixwv/cipherstream/config/WebConfig.java b/src/main/java/com/mattrixwv/cipherstream/config/WebConfig.java
new file mode 100644
index 0000000..cc7c2ee
--- /dev/null
+++ b/src/main/java/com/mattrixwv/cipherstream/config/WebConfig.java
@@ -0,0 +1,19 @@
+package com.mattrixwv.cipherstream.config;
+
+
+import org.springframework.lang.NonNull;
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.config.annotation.CorsRegistry;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+
+@Component
+@EnableWebMvc
+public class WebConfig implements WebMvcConfigurer{
+	@Override
+	public void addCorsMappings(@NonNull CorsRegistry registry){
+		registry.addMapping("/**")
+			.allowedOriginPatterns("http://localhost:3000");
+	}
+}
diff --git a/src/main/java/com/mattrixwv/cipherstream/controller/monosubstitution/CaesarCipherController.java b/src/main/java/com/mattrixwv/cipherstream/controller/monosubstitution/CaesarCipherController.java
index a59b9aa..f833773 100644
--- a/src/main/java/com/mattrixwv/cipherstream/controller/monosubstitution/CaesarCipherController.java
+++ b/src/main/java/com/mattrixwv/cipherstream/controller/monosubstitution/CaesarCipherController.java
@@ -3,6 +3,7 @@ package com.mattrixwv.cipherstream.controller.monosubstitution;
 
 import org.slf4j.MDC;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -29,7 +30,7 @@ public class CaesarCipherController{
 		return CipherInfoUtil.buildInfoNode(CipherInfoUtil.CAESAR_CIPHER_NAME, CipherInfoUtil.CAESAR_CIPHER_DESCRIPTION);
 	}
 
-	@GetMapping("/encode")
+	@PostMapping("/encode")
 	public ObjectNode encodeCaesar(@RequestBody ObjectNode cipherParams){
 		MDC.put(CipherStreamLoggingAspect.CIPHER_NAME_LOGGING, CipherInfoUtil.CAESAR_CIPHER_NAME);
 		log.info("Encoding {}", CipherInfoUtil.CAESAR_CIPHER_NAME);
@@ -52,7 +53,7 @@ public class CaesarCipherController{
 		return cipherParams;
 	}
 
-	@GetMapping("/decode")
+	@PostMapping("/decode")
 	public ObjectNode decodeCaesar(@RequestBody ObjectNode cipherParams){
 		MDC.put(CipherStreamLoggingAspect.CIPHER_NAME_LOGGING, CipherInfoUtil.CAESAR_CIPHER_NAME);
 		log.info("Decoding {}", CipherInfoUtil.CAESAR_CIPHER_NAME);