diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e467fc9..81b77b8e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ v1.4.2 [unreleased]
 -   [#24](https://github.com/latera/camunda-ext/pull/24) Add methods for files to document attaching
 -   [#39](https://github.com/latera/camunda-ext/pull/39) Add custom fields in create and update methods in PlanadoV2 class
 -   [#39](https://github.com/latera/camunda-ext/pull/39) Add html and Content-Disposition to file attachment to mail sender
+-   [#32](https://github.com/latera/camunda-ext/pull/32) Allow to pass only specific fields into hid.Hydra#updateSubscription method
 
 ### Bugfixes
 -   [#27](https://github.com/latera/camunda-ext/pull/27) Remove redundant get methods from hid.Hydra class
diff --git a/src/org/camunda/latera/bss/connectors/hid/hydra/Subscription.groovy b/src/org/camunda/latera/bss/connectors/hid/hydra/Subscription.groovy
index 17123b1b..cf3193e6 100644
--- a/src/org/camunda/latera/bss/connectors/hid/hydra/Subscription.groovy
+++ b/src/org/camunda/latera/bss/connectors/hid/hydra/Subscription.groovy
@@ -4,6 +4,8 @@ import static org.camunda.latera.bss.utils.Oracle.encodeBool
 import static org.camunda.latera.bss.utils.Oracle.encodeFlag
 import static org.camunda.latera.bss.utils.Oracle.encodeDateStr
 import static org.camunda.latera.bss.utils.DateTimeUtil.local
+import static org.camunda.latera.bss.utils.StringUtil.notEmpty
+import static org.camunda.latera.bss.utils.StringUtil.isEmpty
 import java.time.temporal.Temporal
 
 trait Subscription {
@@ -95,7 +97,7 @@ trait Subscription {
   }
 
   private Map putSubscription(Map input) {
-    LinkedHashMap params = mergeParams([
+    LinkedHashMap defaultParams = [
       subscriptionId     : null,
       customerId         : null,
       accountId          : null,
@@ -110,10 +112,48 @@ trait Subscription {
       endDate            : null,
       chargeLogEndDate   : null,
       evaluateDiscounts  : true
-    ], input)
+    ]
 
-    def unitId = getGoodUnitId(params.goodId)
+    LinkedHashMap existingSubscription = [:]
+    if (notEmpty(input.subscriptionId)) {
+      LinkedHashMap subscription = getSubscription(input.subscriptionId)
+      existingSubscription += [
+        subscriptionId     : subscription.n_subscription_id,
+        customerId         : subscription.n_customer_id,
+        accountId          : subscription.n_account_id,
+        docId              : subscription.n_doc_id,
+        goodId             : subscription.n_service_id,
+        equipmentId        : subscription.n_object_id,
+        parSubscriptionId  : subscription.n_par_subscription_id,
+        prevSubscriptionId : subscription.n_prev_subscription_id,
+        quant              : subscription.n_quant,
+        payDay             : subscription.n_pay_day,
+        beginDate          : subscription.d_begin,
+        endDate            : subscription.d_end,
+        chargeLogEndDate   : subscription.d_charge_log_end
+      ]
+    }
 
+    if (notEmpty(input.parSubscriptionId)) {
+      LinkedHashMap parentSubscription = getSubscription(input.parSubscriptionId)
+      existingSubscription += [
+        customerId  : parentSubscription.n_customer_id,
+        accountId   : parentSubscription.n_account_id,
+        docId       : parentSubscription.n_doc_id,
+        equipmentId : parentSubscription.n_object_id
+      ]
+    }
+
+    if (isEmpty(input.customerId) && !notEmpty(input.accountId)) {
+      LinkedHashMap account = getAccount(input.accountId)
+      existingSubscription += [
+        customerId : account.n_subject_id
+      ]
+    }
+
+    LinkedHashMap params = mergeParams(defaultParams, existingSubscription + input)
+
+    def unitId = getGoodUnitId(params.goodId)
     if (unitId == getPieceUnitId() && params.quant == null) {
       params.quant = 1
     } else if (unitId == getUnknownUnitId()) {
@@ -122,7 +162,7 @@ trait Subscription {
 
     try {
       logger.info("Putting subscription with params ${params}")
-      LinkedHashMap subscription = hid.execute('SI_USERS_PKG.SI_USER_GOODS_PUT', [
+      LinkedHashMap result = hid.execute('SI_USERS_PKG.SI_USER_GOODS_PUT', [
         num_N_SUBJ_GOOD_ID         : params.subscriptionId,
         num_N_GOOD_ID              : params.goodId,
         num_N_SUBJECT_ID           : params.customerId,
@@ -139,8 +179,8 @@ trait Subscription {
         num_N_PREV_SUBSCRIPTION_ID : params.prevSubscriptionId,
         b_EvaluateDiscounts        : encodeFlag(params.evaluateDiscounts)
       ])
-      logger.info("   Subscription ${subscription.num_N_SUBJ_GOOD_ID} was put successfully!")
-      return subscription
+      logger.info("   Subscription ${result.num_N_SUBJ_GOOD_ID} was put successfully!")
+      return result
     } catch (Exception e){
       logger.error("   Error while putting subscription!")
       logger.error_oracle(e)