diff --git a/chapter16/ingredient-service/pom.xml b/chapter16/ingredient-service/pom.xml
index c92416aa..1e549142 100644
--- a/chapter16/ingredient-service/pom.xml
+++ b/chapter16/ingredient-service/pom.xml
@@ -105,7 +105,7 @@
             <dependency>
                 <groupId>de.codecentric</groupId>
                 <artifactId>spring-boot-admin-dependencies</artifactId>
-                <version>2.0.2</version>
+                <version>2.3.1</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
diff --git a/chapter16/taco-service/pom.xml b/chapter16/taco-service/pom.xml
index 07736126..4c5bc2db 100644
--- a/chapter16/taco-service/pom.xml
+++ b/chapter16/taco-service/pom.xml
@@ -98,7 +98,7 @@
             <dependency>
                 <groupId>de.codecentric</groupId>
                 <artifactId>spring-boot-admin-dependencies</artifactId>
-                <version>2.0.2</version>
+                <version>2.3.1</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
diff --git a/chapter17/boot-admin-server/pom.xml b/chapter17/boot-admin-server/pom.xml
index f1ae2e49..2d814392 100644
--- a/chapter17/boot-admin-server/pom.xml
+++ b/chapter17/boot-admin-server/pom.xml
@@ -18,7 +18,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
-        <spring-boot-admin.version>2.0.2</spring-boot-admin.version>
+        <spring-boot-admin.version>2.3.1</spring-boot-admin.version>
     </properties>
 
     <dependencies>
diff --git a/chapter17/ingredient-service/pom.xml b/chapter17/ingredient-service/pom.xml
index 975f8456..a4910092 100644
--- a/chapter17/ingredient-service/pom.xml
+++ b/chapter17/ingredient-service/pom.xml
@@ -105,7 +105,7 @@
             <dependency>
                 <groupId>de.codecentric</groupId>
                 <artifactId>spring-boot-admin-dependencies</artifactId>
-                <version>2.0.2</version>
+                <version>2.3.1</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
diff --git a/chapter17/taco-service/pom.xml b/chapter17/taco-service/pom.xml
index 89a0b7f7..989b02d0 100644
--- a/chapter17/taco-service/pom.xml
+++ b/chapter17/taco-service/pom.xml
@@ -97,7 +97,7 @@
             <dependency>
                 <groupId>de.codecentric</groupId>
                 <artifactId>spring-boot-admin-dependencies</artifactId>
-                <version>2.0.2</version>
+                <version>2.3.1</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
diff --git a/chapter18/boot-admin-server/pom.xml b/chapter18/boot-admin-server/pom.xml
index 625e75db..27920a30 100644
--- a/chapter18/boot-admin-server/pom.xml
+++ b/chapter18/boot-admin-server/pom.xml
@@ -18,7 +18,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
-        <spring-boot-admin.version>2.0.2</spring-boot-admin.version>
+        <spring-boot-admin.version>2.3.1</spring-boot-admin.version>
     </properties>
 
     <dependencies>
diff --git a/chapter18/ingredient-service/pom.xml b/chapter18/ingredient-service/pom.xml
index 5693c6e8..ffcf25af 100644
--- a/chapter18/ingredient-service/pom.xml
+++ b/chapter18/ingredient-service/pom.xml
@@ -105,7 +105,7 @@
             <dependency>
                 <groupId>de.codecentric</groupId>
                 <artifactId>spring-boot-admin-dependencies</artifactId>
-                <version>2.0.2</version>
+                <version>2.3.1</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
diff --git a/chapter18/taco-service/pom.xml b/chapter18/taco-service/pom.xml
index d4abaf05..ba57397d 100644
--- a/chapter18/taco-service/pom.xml
+++ b/chapter18/taco-service/pom.xml
@@ -98,7 +98,7 @@
             <dependency>
                 <groupId>de.codecentric</groupId>
                 <artifactId>spring-boot-admin-dependencies</artifactId>
-                <version>2.0.2</version>
+                <version>2.3.1</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
diff --git a/chapter19/boot-admin-server/pom.xml b/chapter19/boot-admin-server/pom.xml
index 2c1f0187..0fd69e0d 100644
--- a/chapter19/boot-admin-server/pom.xml
+++ b/chapter19/boot-admin-server/pom.xml
@@ -17,7 +17,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
-        <spring-boot-admin.version>2.0.2</spring-boot-admin.version>
+        <spring-boot-admin.version>2.3.1</spring-boot-admin.version>
     </properties>
 
     <dependencies>
diff --git a/chapter19/ingredient-service/pom.xml b/chapter19/ingredient-service/pom.xml
index 23274a79..c9ce9cb6 100644
--- a/chapter19/ingredient-service/pom.xml
+++ b/chapter19/ingredient-service/pom.xml
@@ -119,7 +119,7 @@
             <dependency>
                 <groupId>de.codecentric</groupId>
                 <artifactId>spring-boot-admin-dependencies</artifactId>
-                <version>2.0.2</version>
+                <version>2.3.1</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
diff --git a/chapter19/taco-service/pom.xml b/chapter19/taco-service/pom.xml
index 6bc49be6..639f2a5b 100644
--- a/chapter19/taco-service/pom.xml
+++ b/chapter19/taco-service/pom.xml
@@ -98,7 +98,7 @@
             <dependency>
                 <groupId>de.codecentric</groupId>
                 <artifactId>spring-boot-admin-dependencies</artifactId>
-                <version>2.0.2</version>
+                <version>2.3.1</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>