diff --git a/CHANGELOG.md b/CHANGELOG.md
index 86d7e7f0..61eb6b7f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,25 @@
 # Changelog
 
+## [0.4.0](https://www.github.com/googleapis/java-security-private-ca/compare/v0.3.0...v0.4.0) (2021-05-26)
+
+
+### ⚠ BREAKING CHANGES
+
+* Make CertificateTemplate bools optional to indicate unset values (#172)
+
+### Features
+
+* Make CertificateTemplate bools optional to indicate unset values ([#172](https://www.github.com/googleapis/java-security-private-ca/issues/172)) ([c3fddec](https://www.github.com/googleapis/java-security-private-ca/commit/c3fddecf4ab394dff81db57f5cd09ffa87d7f696))
+* Refactored Elliptic Key curves to provide additional options, the NamedCurve enum is replaced by the EcKeyType message ([#158](https://www.github.com/googleapis/java-security-private-ca/issues/158)) ([a79eaa9](https://www.github.com/googleapis/java-security-private-ca/commit/a79eaa92f41727e63e67fbba22ae3a487f4dbbe4))
+
+
+### Dependencies
+
+* update dependency com.google.cloud:google-cloud-shared-dependencies to v0.21.1 ([#161](https://www.github.com/googleapis/java-security-private-ca/issues/161)) ([6e22288](https://www.github.com/googleapis/java-security-private-ca/commit/6e22288b97afcdd869fa03431fc97310fdc50b96))
+* update dependency com.google.cloud:google-cloud-shared-dependencies to v1 ([#164](https://www.github.com/googleapis/java-security-private-ca/issues/164)) ([303b2b4](https://www.github.com/googleapis/java-security-private-ca/commit/303b2b4b1a1c31d9e7ed1cd8c6218ebbaf7dc3a1))
+* update dependency com.google.cloud:google-cloud-shared-dependencies to v1.1.0 ([#173](https://www.github.com/googleapis/java-security-private-ca/issues/173)) ([672fd91](https://www.github.com/googleapis/java-security-private-ca/commit/672fd91f744031912f5be6cd4c19d160ea80b23e))
+* update dependency com.google.cloud:google-cloud-shared-dependencies to v1.2.0 ([#177](https://www.github.com/googleapis/java-security-private-ca/issues/177)) ([020c849](https://www.github.com/googleapis/java-security-private-ca/commit/020c8496bedc2ab1a62c1ef103b98f5885530e26))
+
 ## [0.3.0](https://www.github.com/googleapis/java-security-private-ca/compare/v0.2.8...v0.3.0) (2021-04-15)
 
 
diff --git a/google-cloud-security-private-ca-bom/pom.xml b/google-cloud-security-private-ca-bom/pom.xml
index f67c60d5..6c0a0801 100644
--- a/google-cloud-security-private-ca-bom/pom.xml
+++ b/google-cloud-security-private-ca-bom/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-security-private-ca-bom</artifactId>
-  <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
+  <version>0.4.0</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
   <packaging>pom</packaging>
   <parent>
     <groupId>com.google.cloud</groupId>
@@ -67,27 +67,27 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-security-private-ca</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
+        <version>0.4.0</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-security-private-ca-v1beta1</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1beta1:current} -->
+        <version>0.4.0</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1beta1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-security-private-ca-v1</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1:current} -->
+        <version>0.4.0</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-security-private-ca-v1beta1</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1beta1:current} -->
+        <version>0.4.0</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1beta1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-security-private-ca-v1</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1:current} -->
+        <version>0.4.0</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1:current} -->
       </dependency>
     </dependencies>
   </dependencyManagement>
diff --git a/google-cloud-security-private-ca/pom.xml b/google-cloud-security-private-ca/pom.xml
index 2860a330..c7577968 100644
--- a/google-cloud-security-private-ca/pom.xml
+++ b/google-cloud-security-private-ca/pom.xml
@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-security-private-ca</artifactId>
-  <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
+  <version>0.4.0</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
   <packaging>jar</packaging>
   <name>Google Certificate Authority Service</name>
   <url>https://github.com/googleapis/java-security-private-ca</url>
@@ -11,7 +11,7 @@
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-security-private-ca-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
+    <version>0.4.0</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
   </parent>
   <properties>
     <site.installationModule>google-cloud-security-private-ca</site.installationModule>
diff --git a/grpc-google-cloud-security-private-ca-v1/pom.xml b/grpc-google-cloud-security-private-ca-v1/pom.xml
index f39ac9c3..b5dd01c8 100644
--- a/grpc-google-cloud-security-private-ca-v1/pom.xml
+++ b/grpc-google-cloud-security-private-ca-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-security-private-ca-v1</artifactId>
-  <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1:current} -->
+  <version>0.4.0</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1:current} -->
   <name>grpc-google-cloud-security-private-ca-v1</name>
   <description>GRPC library for google-cloud-security-private-ca</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-security-private-ca-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
+    <version>0.4.0</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/grpc-google-cloud-security-private-ca-v1beta1/pom.xml b/grpc-google-cloud-security-private-ca-v1beta1/pom.xml
index 0238c052..eb2de7d2 100644
--- a/grpc-google-cloud-security-private-ca-v1beta1/pom.xml
+++ b/grpc-google-cloud-security-private-ca-v1beta1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>grpc-google-cloud-security-private-ca-v1beta1</artifactId>
-  <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1beta1:current} -->
+  <version>0.4.0</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1beta1:current} -->
   <name>grpc-google-cloud-security-private-ca-v1beta1</name>
   <description>GRPC library for google-cloud-security-private-ca</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-security-private-ca-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
+    <version>0.4.0</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/pom.xml b/pom.xml
index 4d25e579..dfce0912 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-security-private-ca-parent</artifactId>
   <packaging>pom</packaging>
-  <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
+  <version>0.4.0</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
   <name>Google Certificate Authority Service Parent</name>
   <url>https://github.com/googleapis/java-</url>
   <description>
@@ -70,27 +70,27 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-security-private-ca</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
+        <version>0.4.0</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-security-private-ca-v1</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1:current} -->
+        <version>0.4.0</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-security-private-ca-v1</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1:current} -->
+        <version>0.4.0</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-cloud-security-private-ca-v1beta1</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1beta1:current} -->
+        <version>0.4.0</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1beta1:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-cloud-security-private-ca-v1beta1</artifactId>
-        <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1beta1:current} -->
+        <version>0.4.0</version><!-- {x-version-update:grpc-google-cloud-security-private-ca-v1beta1:current} -->
       </dependency>
 
       <dependency>
diff --git a/proto-google-cloud-security-private-ca-v1/pom.xml b/proto-google-cloud-security-private-ca-v1/pom.xml
index 6527dc88..25b2fd0d 100644
--- a/proto-google-cloud-security-private-ca-v1/pom.xml
+++ b/proto-google-cloud-security-private-ca-v1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-security-private-ca-v1</artifactId>
-  <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1:current} -->
+  <version>0.4.0</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1:current} -->
   <name>proto-google-cloud-security-private-ca-v1</name>
   <description>Proto library for google-cloud-security-private-ca</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-security-private-ca-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
+    <version>0.4.0</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/proto-google-cloud-security-private-ca-v1beta1/pom.xml b/proto-google-cloud-security-private-ca-v1beta1/pom.xml
index 78d86893..567e5f00 100644
--- a/proto-google-cloud-security-private-ca-v1beta1/pom.xml
+++ b/proto-google-cloud-security-private-ca-v1beta1/pom.xml
@@ -4,13 +4,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api.grpc</groupId>
   <artifactId>proto-google-cloud-security-private-ca-v1beta1</artifactId>
-  <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1beta1:current} -->
+  <version>0.4.0</version><!-- {x-version-update:proto-google-cloud-security-private-ca-v1beta1:current} -->
   <name>proto-google-cloud-security-private-ca-v1beta1</name>
   <description>Proto library for google-cloud-security-private-ca</description>
   <parent>
     <groupId>com.google.cloud</groupId>
     <artifactId>google-cloud-security-private-ca-parent</artifactId>
-    <version>0.3.1-SNAPSHOT</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
+    <version>0.4.0</version><!-- {x-version-update:google-cloud-security-private-ca:current} -->
   </parent>
   <dependencies>
     <dependency>
diff --git a/samples/snapshot/pom.xml b/samples/snapshot/pom.xml
index b333c097..c10c0f64 100644
--- a/samples/snapshot/pom.xml
+++ b/samples/snapshot/pom.xml
@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-security-private-ca</artifactId>
-      <version>0.3.1-SNAPSHOT</version>
+      <version>0.4.0</version>
     </dependency>
     <!-- {x-version-update-end} -->
 
diff --git a/versions.txt b/versions.txt
index 6d7521f0..5c6aa647 100644
--- a/versions.txt
+++ b/versions.txt
@@ -1,8 +1,8 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-security-private-ca:0.3.0:0.3.1-SNAPSHOT
-grpc-google-cloud-security-private-ca-v1beta1:0.3.0:0.3.1-SNAPSHOT
-grpc-google-cloud-security-private-ca-v1:0.3.0:0.3.1-SNAPSHOT
-proto-google-cloud-security-private-ca-v1beta1:0.3.0:0.3.1-SNAPSHOT
-proto-google-cloud-security-private-ca-v1:0.3.0:0.3.1-SNAPSHOT
+google-cloud-security-private-ca:0.4.0:0.4.0
+grpc-google-cloud-security-private-ca-v1beta1:0.4.0:0.4.0
+grpc-google-cloud-security-private-ca-v1:0.4.0:0.4.0
+proto-google-cloud-security-private-ca-v1beta1:0.4.0:0.4.0
+proto-google-cloud-security-private-ca-v1:0.4.0:0.4.0