diff --git a/CHANGELOG.md b/CHANGELOG.md
index ecf293ac..9fe4733f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,14 @@
 <!-- This file is generated, please add to it using `knope document-change` in the client-library-templates repo -->
 # Changelog
 
+## 9.0.3 (2026-09-14)
+
+### Fixes
+
+#### Fix nullable field declarations and missing properties across multiple resources
+
+Adds `null` to type declarations for fields that legitimately return nil across redirect_flows, webhooks, scheme_identifiers, customer_bank_accounts, outbound_payments, and billing_request_with_actions. Also adds the missing `period_alignment` property to mandate consent_parameters.
+
 ## 9.0.2 (2026-09-14)
 
 ### Fixes
diff --git a/README.md b/README.md
index ba42c3a3..f85edc35 100644
--- a/README.md
+++ b/README.md
@@ -14,14 +14,14 @@ With Maven:
 <dependency>
     <groupId>com.gocardless</groupId>
     <artifactId>gocardless-pro</artifactId>
-    <version>9.0.2</version>
+    <version>9.0.3</version>
 </dependency>
 ```
 
 With Gradle:
 
 ```
-implementation 'com.gocardless:gocardless-pro:9.0.2'
+implementation 'com.gocardless:gocardless-pro:9.0.3'
 ```
 
 ## Initializing the client
diff --git a/build.gradle b/build.gradle
index 3dd4d94b..3a806bb8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -29,7 +29,7 @@ plugins {
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
 group = 'com.gocardless'
-version = '9.0.2'
+version = '9.0.3'
 
 apply plugin: 'ch.raffael.pegdown-doclet'
 
diff --git a/src/main/java/com/gocardless/http/HttpClient.java b/src/main/java/com/gocardless/http/HttpClient.java
index 5302e82c..cca031df 100644
--- a/src/main/java/com/gocardless/http/HttpClient.java
+++ b/src/main/java/com/gocardless/http/HttpClient.java
@@ -35,7 +35,7 @@ public class HttpClient {
     private static final String DISALLOWED_USER_AGENT_CHARACTERS =
             "[^\\w!#$%&'\\*\\+\\-\\.\\^`\\|~]";
     private static final String USER_AGENT =
-            String.format("gocardless-pro-java/9.0.2 java/%s %s/%s %s/%s",
+            String.format("gocardless-pro-java/9.0.3 java/%s %s/%s %s/%s",
                     cleanUserAgentToken(System.getProperty("java.vm.specification.version")),
                     cleanUserAgentToken(System.getProperty("java.vm.name")),
                     cleanUserAgentToken(System.getProperty("java.version")),
@@ -49,7 +49,7 @@ public class HttpClient {
         builder.put("GoCardless-Version", "2015-07-06");
         builder.put("Accept", "application/json");
         builder.put("GoCardless-Client-Library", "gocardless-pro-java");
-        builder.put("GoCardless-Client-Version", "9.0.2");
+        builder.put("GoCardless-Client-Version", "9.0.3");
         HEADERS = builder.build();
     }
     private final OkHttpClient rawClient;
diff --git a/src/main/java/com/gocardless/resources/BillingRequestWithAction.java b/src/main/java/com/gocardless/resources/BillingRequestWithAction.java
index 4aedb60e..71a9e295 100644
--- a/src/main/java/com/gocardless/resources/BillingRequestWithAction.java
+++ b/src/main/java/com/gocardless/resources/BillingRequestWithAction.java
@@ -23,11 +23,7 @@ private BillingRequestWithAction() {
     private BillingRequests billingRequests;
 
     /**
-     * Bank Authorisations can be used to authorise Billing Requests. Authorisations are created
-     * against a specific bank, usually the bank that provides the payer's account.
-     * 
-     * Creation of Bank Authorisations is only permitted from GoCardless hosted UIs (see Billing
-     * Request Flows) to ensure we meet regulatory requirements for checkout flows.
+     * Bank authorisation resource, or null if no bank authorisation was created.
      */
     public BankAuthorisations getBankAuthorisations() {
         return bankAuthorisations;
@@ -53,11 +49,7 @@ public BillingRequests getBillingRequests() {
     /**
      * Represents a bank authorisation resource returned from the API.
      *
-     * Bank Authorisations can be used to authorise Billing Requests. Authorisations are created
-     * against a specific bank, usually the bank that provides the payer's account.
-     * 
-     * Creation of Bank Authorisations is only permitted from GoCardless hosted UIs (see Billing
-     * Request Flows) to ensure we meet regulatory requirements for checkout flows.
+     * Bank authorisation resource, or null if no bank authorisation was created.
      */
     public static class BankAuthorisations {
         private BankAuthorisations() {
diff --git a/src/main/java/com/gocardless/resources/Mandate.java b/src/main/java/com/gocardless/resources/Mandate.java
index 9bafe73c..ad2a49ca 100644
--- a/src/main/java/com/gocardless/resources/Mandate.java
+++ b/src/main/java/com/gocardless/resources/Mandate.java
@@ -257,6 +257,7 @@ private ConsentParameters() {
         private Integer maxAmountPerPeriod;
         private Integer maxPaymentsPerPeriod;
         private Period period;
+        private PeriodAlignment periodAlignment;
         private String startDate;
 
         /**
@@ -294,6 +295,13 @@ public Period getPeriod() {
             return period;
         }
 
+        /**
+         * The alignment of the payment period.
+         */
+        public PeriodAlignment getPeriodAlignment() {
+            return periodAlignment;
+        }
+
         /**
          * The date from which payments can be taken
          */
@@ -310,6 +318,13 @@ public enum Period {
             FLEXIBLE, @SerializedName("unknown")
             UNKNOWN
         }
+
+        public enum PeriodAlignment {
+            @SerializedName("calendar")
+            CALENDAR, @SerializedName("consent")
+            CONSENT, @SerializedName("unknown")
+            UNKNOWN
+        }
     }
 
     /**