diff --git a/implementation/src/main/java/io/smallrye/config/ConfigSourceInterceptor.java b/implementation/src/main/java/io/smallrye/config/ConfigSourceInterceptor.java
index bab66c0d4..fd2a49de1 100644
--- a/implementation/src/main/java/io/smallrye/config/ConfigSourceInterceptor.java
+++ b/implementation/src/main/java/io/smallrye/config/ConfigSourceInterceptor.java
@@ -72,6 +72,8 @@ default Iterator<ConfigValue> iterateValues(ConfigSourceInterceptorContext conte
     }
 
     ConfigSourceInterceptor EMPTY = new ConfigSourceInterceptor() {
+        private static final long serialVersionUID = 5749001327530543433L;
+
         @Override
         public ConfigValue getValue(final ConfigSourceInterceptorContext context, final String name) {
             return null;
diff --git a/implementation/src/main/java/io/smallrye/config/ConfigValueConfigSourceWrapper.java b/implementation/src/main/java/io/smallrye/config/ConfigValueConfigSourceWrapper.java
index 473c35110..34df75c17 100644
--- a/implementation/src/main/java/io/smallrye/config/ConfigValueConfigSourceWrapper.java
+++ b/implementation/src/main/java/io/smallrye/config/ConfigValueConfigSourceWrapper.java
@@ -7,6 +7,8 @@
 import org.eclipse.microprofile.config.spi.ConfigSource;
 
 final class ConfigValueConfigSourceWrapper implements ConfigValueConfigSource, Serializable {
+    private static final long serialVersionUID = -1109094614437147326L;
+
     private final ConfigSource configSource;
 
     private ConfigValueConfigSourceWrapper(final ConfigSource configSource) {
diff --git a/implementation/src/main/java/io/smallrye/config/ExpressionConfigSourceInterceptor.java b/implementation/src/main/java/io/smallrye/config/ExpressionConfigSourceInterceptor.java
index 968c0dcf3..e6828c2ce 100644
--- a/implementation/src/main/java/io/smallrye/config/ExpressionConfigSourceInterceptor.java
+++ b/implementation/src/main/java/io/smallrye/config/ExpressionConfigSourceInterceptor.java
@@ -9,6 +9,8 @@
 
 @Priority(Priorities.LIBRARY + 600)
 public class ExpressionConfigSourceInterceptor implements ConfigSourceInterceptor {
+    private static final long serialVersionUID = -539336551011916218L;
+
     private static final int MAX_DEPTH = 32;
 
     @Override
diff --git a/implementation/src/main/java/io/smallrye/config/FallbackConfigSourceInterceptor.java b/implementation/src/main/java/io/smallrye/config/FallbackConfigSourceInterceptor.java
index 9dc467824..f6a5c3063 100644
--- a/implementation/src/main/java/io/smallrye/config/FallbackConfigSourceInterceptor.java
+++ b/implementation/src/main/java/io/smallrye/config/FallbackConfigSourceInterceptor.java
@@ -7,6 +7,8 @@
 
 @Priority(Priorities.LIBRARY + 400)
 public class FallbackConfigSourceInterceptor implements ConfigSourceInterceptor {
+    private static final long serialVersionUID = 1472367702046537565L;
+
     private final Function<String, String> mapping;
 
     public FallbackConfigSourceInterceptor(final Function<String, String> mapping) {
diff --git a/implementation/src/main/java/io/smallrye/config/LoggingConfigSourceInterceptor.java b/implementation/src/main/java/io/smallrye/config/LoggingConfigSourceInterceptor.java
index 691143ae3..ec127539e 100644
--- a/implementation/src/main/java/io/smallrye/config/LoggingConfigSourceInterceptor.java
+++ b/implementation/src/main/java/io/smallrye/config/LoggingConfigSourceInterceptor.java
@@ -6,6 +6,8 @@
 
 @Priority(Priorities.LIBRARY + 200)
 public class LoggingConfigSourceInterceptor implements ConfigSourceInterceptor {
+    private static final long serialVersionUID = 367246512037404779L;
+
     @Override
     public ConfigValue getValue(final ConfigSourceInterceptorContext context, final String name) {
         try {
diff --git a/implementation/src/main/java/io/smallrye/config/ProfileConfigSourceInterceptor.java b/implementation/src/main/java/io/smallrye/config/ProfileConfigSourceInterceptor.java
index a6af56c67..4d00fa7d2 100644
--- a/implementation/src/main/java/io/smallrye/config/ProfileConfigSourceInterceptor.java
+++ b/implementation/src/main/java/io/smallrye/config/ProfileConfigSourceInterceptor.java
@@ -12,6 +12,7 @@
 public class ProfileConfigSourceInterceptor implements ConfigSourceInterceptor {
     public static final String SMALLRYE_PROFILE = "smallrye.config.profile";
 
+    private static final long serialVersionUID = -6305289277993917313L;
     private static final Comparator<ConfigValue> CONFIG_SOURCE_COMPARATOR = (o1, o2) -> {
         int res = Integer.compare(o2.getConfigSourceOrdinal(), o1.getConfigSourceOrdinal());
         if (res != 0) {
diff --git a/implementation/src/main/java/io/smallrye/config/RelocateConfigSourceInterceptor.java b/implementation/src/main/java/io/smallrye/config/RelocateConfigSourceInterceptor.java
index 08dd3eafc..705ec10df 100644
--- a/implementation/src/main/java/io/smallrye/config/RelocateConfigSourceInterceptor.java
+++ b/implementation/src/main/java/io/smallrye/config/RelocateConfigSourceInterceptor.java
@@ -7,6 +7,8 @@
 
 @Priority(Priorities.LIBRARY + 1000)
 public class RelocateConfigSourceInterceptor implements ConfigSourceInterceptor {
+    private static final long serialVersionUID = 3476637906383945843L;
+
     private final Function<String, String> mapping;
 
     public RelocateConfigSourceInterceptor(final Function<String, String> mapping) {
diff --git a/implementation/src/main/java/io/smallrye/config/SecretKeys.java b/implementation/src/main/java/io/smallrye/config/SecretKeys.java
index 0ed72393e..68a49aac9 100644
--- a/implementation/src/main/java/io/smallrye/config/SecretKeys.java
+++ b/implementation/src/main/java/io/smallrye/config/SecretKeys.java
@@ -1,9 +1,8 @@
 package io.smallrye.config;
 
-import java.io.Serializable;
 import java.util.function.Supplier;
 
-public final class SecretKeys implements Serializable {
+public final class SecretKeys {
     private static final ThreadLocal<Boolean> LOCKED = ThreadLocal.withInitial(() -> Boolean.TRUE);
 
     private SecretKeys() {
diff --git a/implementation/src/main/java/io/smallrye/config/SecretKeysConfigSourceInterceptor.java b/implementation/src/main/java/io/smallrye/config/SecretKeysConfigSourceInterceptor.java
index ee2e84a2d..72e8123e5 100644
--- a/implementation/src/main/java/io/smallrye/config/SecretKeysConfigSourceInterceptor.java
+++ b/implementation/src/main/java/io/smallrye/config/SecretKeysConfigSourceInterceptor.java
@@ -6,6 +6,8 @@
 
 @Priority(Priorities.LIBRARY + 100)
 public class SecretKeysConfigSourceInterceptor implements ConfigSourceInterceptor {
+    private static final long serialVersionUID = 7291982039729980590L;
+
     private final Set<String> secrets;
 
     public SecretKeysConfigSourceInterceptor(final Set<String> secrets) {
diff --git a/implementation/src/main/java/io/smallrye/config/SmallRyeConfig.java b/implementation/src/main/java/io/smallrye/config/SmallRyeConfig.java
index 72e254359..caae5b254 100644
--- a/implementation/src/main/java/io/smallrye/config/SmallRyeConfig.java
+++ b/implementation/src/main/java/io/smallrye/config/SmallRyeConfig.java
@@ -267,6 +267,8 @@ public <T> Converter<T> getConverter(Class<T> asType) {
     }
 
     private static class ConfigSources implements Serializable {
+        private static final long serialVersionUID = 3483018375584151712L;
+
         private final List<ConfigSource> sources;
         private final List<ConfigSourceInterceptor> interceptors;
         private final ConfigSourceInterceptorContext interceptorChain;
diff --git a/implementation/src/main/java/io/smallrye/config/SmallRyeConfigSourceInterceptor.java b/implementation/src/main/java/io/smallrye/config/SmallRyeConfigSourceInterceptor.java
index 2de10ba7d..838fffbb0 100644
--- a/implementation/src/main/java/io/smallrye/config/SmallRyeConfigSourceInterceptor.java
+++ b/implementation/src/main/java/io/smallrye/config/SmallRyeConfigSourceInterceptor.java
@@ -9,6 +9,8 @@
 import org.eclipse.microprofile.config.spi.ConfigSource;
 
 class SmallRyeConfigSourceInterceptor implements ConfigSourceInterceptor {
+    private static final long serialVersionUID = 5513331820671039755L;
+
     private final ConfigValueConfigSource configSource;
 
     private SmallRyeConfigSourceInterceptor(final ConfigSource configSource) {
diff --git a/implementation/src/main/java/io/smallrye/config/SmallRyeConfigSourceInterceptorContext.java b/implementation/src/main/java/io/smallrye/config/SmallRyeConfigSourceInterceptorContext.java
index b37fe8a39..3848e3bb5 100644
--- a/implementation/src/main/java/io/smallrye/config/SmallRyeConfigSourceInterceptorContext.java
+++ b/implementation/src/main/java/io/smallrye/config/SmallRyeConfigSourceInterceptorContext.java
@@ -3,8 +3,10 @@
 import java.util.Iterator;
 
 class SmallRyeConfigSourceInterceptorContext implements ConfigSourceInterceptorContext {
-    private ConfigSourceInterceptor interceptor;
-    private SmallRyeConfigSourceInterceptorContext next;
+    private static final long serialVersionUID = 6654406739008729337L;
+
+    private final ConfigSourceInterceptor interceptor;
+    private final SmallRyeConfigSourceInterceptorContext next;
 
     SmallRyeConfigSourceInterceptorContext(
             final ConfigSourceInterceptor interceptor,