diff --git a/src/main/java/jota/IotaAPIService.java b/src/main/java/jota/IotaAPIService.java
index 2946307..bc3ca50 100644
--- a/src/main/java/jota/IotaAPIService.java
+++ b/src/main/java/jota/IotaAPIService.java
@@ -16,6 +16,7 @@ public interface IotaAPIService {
 
     String CONTENT_TYPE_HEADER = "Content-Type: application/json";
     String USER_AGENT_HEADER = "User-Agent: JOTA-API wrapper";
+    String X_IOTA_API_VERSION_HEADER = "X-IOTA-API-Version: 1";
 
     /**
      * Returns information about your node.
@@ -25,7 +26,7 @@ public interface IotaAPIService {
      *
      * @return a {@code NodeInfoResponse} object, if succesfull.
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<GetNodeInfoResponse> getNodeInfo(@Body IotaCommandRequest request);
 
@@ -35,7 +36,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "getNeighbors"}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<GetNeighborsResponse> getNeighbors(@Body IotaCommandRequest request);
 
@@ -45,7 +46,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "addNeighbors", "uris": ["udp://8.8.8.8:14265", "udp://8.8.8.5:14265"]}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<AddNeighborsResponse> addNeighbors(@Body IotaNeighborsRequest request);
 
@@ -55,7 +56,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "removeNeighbors", "uris": ["udp://8.8.8.8:14265", "udp://8.8.8.5:14265"]}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<RemoveNeighborsResponse> removeNeighbors(@Body IotaNeighborsRequest request);
 
@@ -65,7 +66,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "getTips"}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<GetTipsResponse> getTips(@Body IotaCommandRequest request);
 
@@ -75,7 +76,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 \ -X POST \ -H 'Content-Type: application/json' \
      * -d '{"command": "findTransactions", "addresses": ["RVORZ9SIIP9RCYMREUIXXVPQIPHVCNPQ9HZWYKFWYWZRE9JQKG9REPKIASHUUECPSQO9JT9XNMVKWYGVAZETAIRPTM"]}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<FindTransactionResponse> findTransactions(@Body IotaFindTransactionsRequest request);
 
@@ -86,7 +87,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265   -X POST   -H 'Content-Type: application/json'
      * -d '{"command": "getInclusionStates", "transactions"Q9HZWYKFWYWZRE9JQKG9REPKIASHUUECPSQO9JT9XNMVKWYGVAZETAIRPTM"], "tips" : []}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<GetInclusionStateResponse> getInclusionStates(@Body IotaGetInclusionStateRequest request);
 
@@ -96,7 +97,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "getTrytes", "hashes": ["OAATQS9VQLSXCLDJVJJVYUGONXAXOFMJOZNSYWRZSWECMXAQQURHQBJNLD9IOFEPGZEPEMPXCIVRX9999"]}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<GetTrytesResponse> getTrytes(@Body IotaGetTrytesRequest request);
 
@@ -106,7 +107,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "getTransactionsToApprove", "depth": 27}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<GetTransactionsToApproveResponse> getTransactionsToApprove(@Body IotaGetTransactionsToApproveRequest request);
 
@@ -116,7 +117,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "getBalances", "addresses": ["HBBYKAKTILIPVUKFOTSLHGENPTXYBNKXZFQFR9VQFWNBMTQNRVOUKPVPRNBSZVVILMAFBKOTBLGLWLOHQ"], "threshold": 100}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<GetBalancesResponse> getBalances(@Body IotaGetBalancesRequest request);
 
@@ -126,7 +127,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "attachToTangle", "trunkTransaction": "JVMTDGDPDFYHMZPMWEKKANBQSLSDTIIHAYQUMZOKHXXXGJHJDQPOMDOMNRDKYCZRUFZROZDADTHZC9999", "branchTransaction": "P9KFSJVGSPLXAEBJSHWFZLGP9GGJTIO9YITDEHATDTGAFLPLBZ9FOFWWTKMAZXZHFGQHUOXLXUALY9999", "minWeightMagnitude": 18, "trytes": ["TRYTVALUEHERE"]}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<GetAttachToTangleResponse> attachToTangle(@Body IotaAttachToTangleRequest request);
 
@@ -136,7 +137,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "interruptAttachingToTangle" }
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<InterruptAttachingToTangleResponse> interruptAttachingToTangle(@Body IotaCommandRequest request);
 
@@ -146,7 +147,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "broadcastTransactions", "trytes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}
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<BroadcastTransactionsResponse> broadcastTransactions(@Body IotaBroadcastTransactionRequest request);
 
@@ -156,7 +157,7 @@ public interface IotaAPIService {
      * curl http://localhost:14265 -X POST -H 'Content-Type: application/json'
      * -d '{"command": "storeTransactions", "trytes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}'
      */
-    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER})
+    @Headers({CONTENT_TYPE_HEADER, USER_AGENT_HEADER, X_IOTA_API_VERSION_HEADER})
     @POST("./")
     Call<StoreTransactionsResponse> storeTransactions(@Body IotaStoreTransactionsRequest request);
 }