diff --git a/org.jgrapes.util/bnd.bnd b/org.jgrapes.util/bnd.bnd
index f65db6db332..aa0f6517482 100644
--- a/org.jgrapes.util/bnd.bnd
+++ b/org.jgrapes.util/bnd.bnd
@@ -9,12 +9,6 @@ Export-Package: \
 	org.jgrapes.util;version="${api_version}",\
 	org.jgrapes.util.events;version="${api_version}"
 
-# Not directly referenced and not derived from gradle configuration
-Import-Package: com.electronwill.nightconfig.json,\
-    com.electronwill.nightconfig.toml,\
-    com.electronwill.nightconfig.yaml,\
-    *
-
 -sources: true
 
 -dsannotations: 
diff --git a/org.jgrapes.util/build.gradle b/org.jgrapes.util/build.gradle
index a750fa6a9bd..17535b4a81b 100644
--- a/org.jgrapes.util/build.gradle
+++ b/org.jgrapes.util/build.gradle
@@ -2,11 +2,11 @@ dependencies {
 	api project(':org.jgrapes.core')
 	
 	implementation 'com.electronwill.night-config:core:[3.6.7,3.7]'
-    runtimeOnly 'com.electronwill.night-config:json:[3.6.7,3.7]'
-    runtimeOnly 'com.electronwill.night-config:toml:[3.6.7,3.7]'
-    runtimeOnly 'com.electronwill.night-config:yaml:[3.6.7,3.7]'
+    implementation 'com.electronwill.night-config:json:[3.6.7,3.7]'
+    implementation 'com.electronwill.night-config:toml:[3.6.7,3.7]'
+    implementation 'com.electronwill.night-config:yaml:[3.6.7,3.7]'
     // https://security.snyk.io/package/maven/org.yaml:snakeyaml
-    runtimeOnly 'org.yaml:snakeyaml:[1.33,2]'
+    implementation 'org.yaml:snakeyaml:[1.33,2]'
 
     testImplementation 'org.jdrupes.json:json:[2.0.0,2.1.0)'
 	testRuntimeOnly project.files('test-resources')
diff --git a/org.jgrapes.util/src/org/jgrapes/util/JsonConfigurationStore.java b/org.jgrapes.util/src/org/jgrapes/util/JsonConfigurationStore.java
index 25024606e67..c788ea86115 100644
--- a/org.jgrapes.util/src/org/jgrapes/util/JsonConfigurationStore.java
+++ b/org.jgrapes.util/src/org/jgrapes/util/JsonConfigurationStore.java
@@ -118,6 +118,8 @@ public JsonConfigurationStore(Channel componentChannel, File file,
     public JsonConfigurationStore(Channel componentChannel, File file,
             boolean update, boolean watch) throws IOException {
         super(componentChannel, file, update, watch);
+        // Force load of JsonFormat and its registration. Required for OSGi.
+        com.electronwill.nightconfig.json.JsonFormat.minimalInstance();
         config = FileConfig.builder(file.getAbsolutePath()).sync().concurrent()
             .build();
         config.load();
diff --git a/org.jgrapes.util/src/org/jgrapes/util/TomlConfigurationStore.java b/org.jgrapes.util/src/org/jgrapes/util/TomlConfigurationStore.java
index 3b0c0a581df..0776ae2e90f 100644
--- a/org.jgrapes.util/src/org/jgrapes/util/TomlConfigurationStore.java
+++ b/org.jgrapes.util/src/org/jgrapes/util/TomlConfigurationStore.java
@@ -114,6 +114,8 @@ public TomlConfigurationStore(Channel componentChannel, File file,
     public TomlConfigurationStore(Channel componentChannel, File file,
             boolean update, boolean watch) throws IOException {
         super(componentChannel, file, update, watch);
+        // Force load of TomlFormat and its registration. Required for OSGi.
+        com.electronwill.nightconfig.toml.TomlFormat.instance();
         config = CommentedFileConfig.builder(file.getAbsolutePath()).sync()
             .concurrent().build();
         config.load();
diff --git a/org.jgrapes.util/src/org/jgrapes/util/YamlConfigurationStore.java b/org.jgrapes.util/src/org/jgrapes/util/YamlConfigurationStore.java
index 39840ad6b40..b19cbd7a271 100644
--- a/org.jgrapes.util/src/org/jgrapes/util/YamlConfigurationStore.java
+++ b/org.jgrapes.util/src/org/jgrapes/util/YamlConfigurationStore.java
@@ -118,6 +118,8 @@ public YamlConfigurationStore(Channel componentChannel, File file,
     public YamlConfigurationStore(Channel componentChannel, File file,
             boolean update, boolean watch) throws IOException {
         super(componentChannel, file, update, watch);
+        // Force load of YamlFormat and its registration. Required for OSGi.
+        com.electronwill.nightconfig.yaml.YamlFormat.defaultInstance();
         config = FileConfig.builder(file.getAbsolutePath()).sync().concurrent()
             .build();
         config.load();