diff --git a/pom.xml b/pom.xml
index 74c163f..ed86ebf 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>de.stklcode.jvault</groupId>
     <artifactId>connector</artifactId>
-    <version>0.4.0</version>
+    <version>0.5.0-SNAPSHOT</version>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
diff --git a/src/main/java/de/stklcode/jvault/connector/HTTPVaultConnector.java b/src/main/java/de/stklcode/jvault/connector/HTTPVaultConnector.java
index 6e23abc..a7b0f0d 100644
--- a/src/main/java/de/stklcode/jvault/connector/HTTPVaultConnector.java
+++ b/src/main/java/de/stklcode/jvault/connector/HTTPVaultConnector.java
@@ -499,7 +499,7 @@ public class HTTPVaultConnector implements VaultConnector {
     }
 
     @Override
-    public boolean writeSecret(final String key, final String value) throws VaultConnectorException {
+    public void writeSecret(final String key, final String value) throws VaultConnectorException {
         if (!isAuthorized())
             throw new AuthorizationRequiredException();
 
@@ -508,11 +508,12 @@ public class HTTPVaultConnector implements VaultConnector {
 
         Map<String, String> param = new HashMap<>();
         param.put("value", value);
-        return requestPost(PATH_SECRET + "/" + key, param).equals("");
+        if (!requestPost(PATH_SECRET + "/" + key, param).equals(""))
+            throw new InvalidResponseException("Received response where none was expected.");
     }
 
     @Override
-    public boolean deleteSecret(String key) throws VaultConnectorException {
+    public void deleteSecret(String key) throws VaultConnectorException {
         if (!isAuthorized())
             throw new AuthorizationRequiredException();
 
@@ -521,13 +522,11 @@ public class HTTPVaultConnector implements VaultConnector {
 
         /* Response should be code 204 without content */
         if (!response.equals(""))
-            throw new InvalidResponseException("Received response where non was expected.");
-
-        return true;
+            throw new InvalidResponseException("Received response where none was expected.");
     }
 
     @Override
-    public boolean revoke(String leaseID) throws VaultConnectorException {
+    public void revoke(String leaseID) throws VaultConnectorException {
         if (!isAuthorized())
             throw new AuthorizationRequiredException();
 
@@ -536,9 +535,7 @@ public class HTTPVaultConnector implements VaultConnector {
 
         /* Response should be code 204 without content */
         if (!response.equals(""))
-            throw new InvalidResponseException("Received response where non was expected.");
-
-        return true;
+            throw new InvalidResponseException("Received response where none was expected.");
     }
 
     @Override
diff --git a/src/main/java/de/stklcode/jvault/connector/VaultConnector.java b/src/main/java/de/stklcode/jvault/connector/VaultConnector.java
index 829ff7b..8603577 100644
--- a/src/main/java/de/stklcode/jvault/connector/VaultConnector.java
+++ b/src/main/java/de/stklcode/jvault/connector/VaultConnector.java
@@ -387,28 +387,25 @@ public interface VaultConnector {
      *
      * @param key   Secret path
      * @param value Secret value
-     * @return TRUE on success
      * @throws VaultConnectorException on error
      */
-    boolean writeSecret(final String key, final String value) throws VaultConnectorException;
+    void writeSecret(final String key, final String value) throws VaultConnectorException;
 
     /**
      * Delete secret from Vault.
      *
      * @param key Secret path
-     * @return TRUE on succevss
      * @throws VaultConnectorException on error
      */
-    boolean deleteSecret(final String key) throws VaultConnectorException;
+    void deleteSecret(final String key) throws VaultConnectorException;
 
     /**
      * Revoke given lease immediately.
      *
      * @param leaseID the lease ID
-     * @return TRUE on success
      * @throws VaultConnectorException on error
      */
-    boolean revoke(final String leaseID) throws VaultConnectorException;
+    void revoke(final String leaseID) throws VaultConnectorException;
 
     /**
      * Renew lease with given ID.
diff --git a/src/test/java/de/stklcode/jvault/connector/HTTPVaultConnectorTest.java b/src/test/java/de/stklcode/jvault/connector/HTTPVaultConnectorTest.java
index d959109..7dae61b 100644
--- a/src/test/java/de/stklcode/jvault/connector/HTTPVaultConnectorTest.java
+++ b/src/test/java/de/stklcode/jvault/connector/HTTPVaultConnectorTest.java
@@ -523,29 +523,28 @@ public class HTTPVaultConnectorTest {
 
         /* Try to write to null path */
         try {
-            boolean res = connector.writeSecret(null, "someValue");
+            connector.writeSecret(null, "someValue");
             fail("Secret written to null path.");
         } catch (VaultConnectorException e) {
             assertThat(e, instanceOf(InvalidRequestException.class));
         }
         /* Try to write to invalid path */
         try {
-            boolean res = connector.writeSecret("", "someValue");
+            connector.writeSecret("", "someValue");
             fail("Secret written to invalid path.");
         } catch (VaultConnectorException e) {
             assertThat(e, instanceOf(InvalidRequestException.class));
         }
         /* Try to write to a path the user has no access for */
         try {
-            boolean res = connector.writeSecret("invalid/path", "someValue");
+            connector.writeSecret("invalid/path", "someValue");
             fail("Secret written to inaccessible path.");
         } catch (VaultConnectorException e) {
             assertThat(e, instanceOf(PermissionDeniedException.class));
         }
         /* Perform a valid write/read roundtrip to valid path. Also check UTF8-encoding. */
         try {
-            boolean res = connector.writeSecret(SECRET_PATH + "/temp", "Abc123äöü,!");
-            assertThat("Secret could not be written to valid path.", res, is(true));
+            connector.writeSecret(SECRET_PATH + "/temp", "Abc123äöü,!");
         } catch (VaultConnectorException e) {
             fail("Secret written to inaccessible path.");
         }
@@ -567,8 +566,7 @@ public class HTTPVaultConnectorTest {
 
         /* Write a test secret to vault */
         try {
-            boolean res = connector.writeSecret(SECRET_PATH + "/toDelete", "secret content");
-            assumeThat("Secret could not be written path.", res, is(true));
+            connector.writeSecret(SECRET_PATH + "/toDelete", "secret content");
         } catch (VaultConnectorException e) {
             fail("Secret written to inaccessible path.");
         }
@@ -582,8 +580,7 @@ public class HTTPVaultConnectorTest {
 
         /* Delete secret */
         try {
-            boolean deleted = connector.deleteSecret(SECRET_PATH + "/toDelete");
-            assertThat("Revocation of secret faiked.", deleted, is(true));
+            connector.deleteSecret(SECRET_PATH + "/toDelete");
         } catch (VaultConnectorException e) {
             fail("Revocation threw unexpected exception.");
         }
@@ -608,8 +605,7 @@ public class HTTPVaultConnectorTest {
 
         /* Write a test secret to vault */
         try {
-            boolean res = connector.writeSecret(SECRET_PATH + "/toRevoke", "secret content");
-            assumeThat("Secret could not be written path.", res, is(true));
+            connector.writeSecret(SECRET_PATH + "/toRevoke", "secret content");
         } catch (VaultConnectorException e) {
             fail("Secret written to inaccessible path.");
         }
@@ -623,8 +619,7 @@ public class HTTPVaultConnectorTest {
 
         /* Revoke secret */
         try {
-            boolean revoked = connector.revoke(SECRET_PATH + "/toRevoke");
-            assertThat("Revocation of secret faiked.", revoked, is(true));
+            connector.revoke(SECRET_PATH + "/toRevoke");
         } catch (VaultConnectorException e) {
             fail("Revocation threw unexpected exception.");
         }