diff --git a/org.lflang/src/org/lflang/federated/extensions/TSExtension.java b/org.lflang/src/org/lflang/federated/extensions/TSExtension.java
index 95b9dc2796..e438b1b866 100644
--- a/org.lflang/src/org/lflang/federated/extensions/TSExtension.java
+++ b/org.lflang/src/org/lflang/federated/extensions/TSExtension.java
@@ -117,7 +117,7 @@ public String generatePreamble(FederateInstance federate, FedFileConfig fileConf
                               .collect(Collectors.joining(",")),
             federate.id,
             minOutputDelay == null ? "undefined"
-                                   : "%s".formatted(new TSTypes().getTargetTimeExpr(minOutputDelay)),
+                                   : "%s".formatted(TSTypes.getInstance().getTargetTimeExpr(minOutputDelay)),
             federate.networkMessageActions
                 .stream()
                 .map(Variable::getName)
diff --git a/org.lflang/src/org/lflang/generator/ts/TSConstructorGenerator.kt b/org.lflang/src/org/lflang/generator/ts/TSConstructorGenerator.kt
index c65cd157c5..0075950a1f 100644
--- a/org.lflang/src/org/lflang/generator/ts/TSConstructorGenerator.kt
+++ b/org.lflang/src/org/lflang/generator/ts/TSConstructorGenerator.kt
@@ -23,7 +23,7 @@ class TSConstructorGenerator(
 ) {
 
     private fun initializeParameter(p: Parameter): String =
-        "${p.name}: ${TSTypes.getTargetType(p)} = ${TSTypes.getTargetInitializer(p)}"
+        "${p.name}: ${TSTypes.getInstance().getTargetType(p)} = ${TSTypes.getInstance().getTargetInitializer(p)}"
 
     private fun generateConstructorArguments(reactor: Reactor): String {
         val arguments = StringJoiner(", \n")
diff --git a/org.lflang/src/org/lflang/generator/ts/TSDelayBodyGenerator.kt b/org.lflang/src/org/lflang/generator/ts/TSDelayBodyGenerator.kt
index b0a011d042..61aac6750e 100644
--- a/org.lflang/src/org/lflang/generator/ts/TSDelayBodyGenerator.kt
+++ b/org.lflang/src/org/lflang/generator/ts/TSDelayBodyGenerator.kt
@@ -16,7 +16,7 @@ object TSDelayBodyGenerator : DelayBodyGenerator {
      */
     private fun getActionType(action: Action): String {
         return if (action.type != null) {
-            TSTypes.getTargetType(action.type)
+            TSTypes.getInstance().getTargetType(action.type)
         } else {
             "Present"
         }
diff --git a/org.lflang/src/org/lflang/generator/ts/TSExtensions.kt b/org.lflang/src/org/lflang/generator/ts/TSExtensions.kt
index 4ed12daa13..a28e462921 100644
--- a/org.lflang/src/org/lflang/generator/ts/TSExtensions.kt
+++ b/org.lflang/src/org/lflang/generator/ts/TSExtensions.kt
@@ -39,7 +39,7 @@ fun WidthSpec.toTSCode(): String = terms.joinToString(" + ") {
  * @return The TS type.
  */
 val Port.tsPortType: String
-    get() = type?.let { TSTypes.getTargetType(it) } ?: "Present"
+    get() = type?.let { TSTypes.getInstance().getTargetType(it) } ?: "Present"
 
 /**
  * Return a TS type for the specified action.
@@ -48,7 +48,7 @@ val Port.tsPortType: String
  * @return The TS type.
  */
 val Action.tsActionType: String
-    get() = type?.let { TSTypes.getTargetType(it) } ?: "Present"
+    get() = type?.let { TSTypes.getInstance().getTargetType(it) } ?: "Present"
 
-fun Expression.toTsTime(): String = TSTypes.getTargetTimeExpr(this)
-fun TimeValue.toTsTime(): String = TSTypes.getTargetTimeExpr(this)
+fun Expression.toTsTime(): String = TSTypes.getInstance().getTargetTimeExpr(this)
+fun TimeValue.toTsTime(): String = TSTypes.getInstance().getTargetTimeExpr(this)
diff --git a/org.lflang/src/org/lflang/generator/ts/TSGenerator.kt b/org.lflang/src/org/lflang/generator/ts/TSGenerator.kt
index 3fd3675d52..9262e44e64 100644
--- a/org.lflang/src/org/lflang/generator/ts/TSGenerator.kt
+++ b/org.lflang/src/org/lflang/generator/ts/TSGenerator.kt
@@ -429,7 +429,7 @@ class TSGenerator(
         return true
     }
 
-    override fun getTargetTypes(): TargetTypes = TSTypes
+    override fun getTargetTypes(): TargetTypes = TSTypes.getInstance()
 
     override fun getTarget(): Target {
         return Target.TS
diff --git a/org.lflang/src/org/lflang/generator/ts/TSInstanceGenerator.kt b/org.lflang/src/org/lflang/generator/ts/TSInstanceGenerator.kt
index 63857c0132..97e753f99b 100644
--- a/org.lflang/src/org/lflang/generator/ts/TSInstanceGenerator.kt
+++ b/org.lflang/src/org/lflang/generator/ts/TSInstanceGenerator.kt
@@ -25,10 +25,10 @@ class TSInstanceGenerator(
 
     private fun getTypeParams(typeParms: List<Type>): String =
         if (typeParms.isEmpty()) ""
-        else typeParms.joinToString(", ", "<", ">") { TSTypes.getTargetType(it) }
+        else typeParms.joinToString(", ", "<", ">") { TSTypes.getInstance().getTargetType(it) }
 
     private fun getReactorParameterList(parameters: List<Parameter>): String =
-        parameters.joinToString(", ", "[__Reactor, ", "]") { TSTypes.getTargetType(it) }
+        parameters.joinToString(", ", "[__Reactor, ", "]") { TSTypes.getInstance().getTargetType(it) }
 
 
     fun generateClassProperties(): String =
@@ -50,7 +50,7 @@ class TSInstanceGenerator(
             childReactorArguments.add("this")
 
             for (parameter in childReactor.reactorClass.toDefinition().parameters) {
-                childReactorArguments.add(TSTypes.getTargetInitializer(parameter, childReactor))
+                childReactorArguments.add(TSTypes.getInstance().getTargetInitializer(parameter, childReactor))
             }
             if (childReactor.isBank) {
                 childReactorInstantiations.add(
diff --git a/org.lflang/src/org/lflang/generator/ts/TSParameterGenerator.kt b/org.lflang/src/org/lflang/generator/ts/TSParameterGenerator.kt
index 5ded5814b0..838186a6dc 100644
--- a/org.lflang/src/org/lflang/generator/ts/TSParameterGenerator.kt
+++ b/org.lflang/src/org/lflang/generator/ts/TSParameterGenerator.kt
@@ -12,7 +12,7 @@ class TSParameterGenerator(
 
     fun generateClassProperties(): String =
         parameters.joinWithLn {
-            "${it.name}: __Parameter<${TSTypes.getTargetType(it)}>;"
+            "${it.name}: __Parameter<${TSTypes.getInstance().getTargetType(it)}>;"
         }
 
     fun generateInstantiations(): String =
diff --git a/org.lflang/src/org/lflang/generator/ts/TSParameterPreambleGenerator.kt b/org.lflang/src/org/lflang/generator/ts/TSParameterPreambleGenerator.kt
index c9fef820f0..305369832e 100644
--- a/org.lflang/src/org/lflang/generator/ts/TSParameterPreambleGenerator.kt
+++ b/org.lflang/src/org/lflang/generator/ts/TSParameterPreambleGenerator.kt
@@ -69,7 +69,7 @@ class TSParameterPreambleGenerator(
         mainParameters.joinWithLn { parameter ->
 
             """
-                |let __CL${parameter.name}: ${TSTypes.getTargetType(parameter)} | undefined = undefined;
+                |let __CL${parameter.name}: ${TSTypes.getInstance().getTargetType(parameter)} | undefined = undefined;
                 |if (__processedCLArgs.${parameter.name} !== undefined) {
                 |    if (__processedCLArgs.${parameter.name} !== null) {
                 |        __CL${parameter.name} = __processedCLArgs.${parameter.name};
@@ -114,7 +114,7 @@ class TSParameterPreambleGenerator(
             var customArgType: String? = null
             var customTypeLabel: String? = null
 
-            val paramType = TSTypes.getTargetType(parameter)
+            val paramType = TSTypes.getInstance().getTargetType(parameter)
             if (paramType == "string") {
                 mainParameters.add(parameter)
                 customArgType = "String";
diff --git a/org.lflang/src/org/lflang/generator/ts/TSReactionGenerator.kt b/org.lflang/src/org/lflang/generator/ts/TSReactionGenerator.kt
index 4354ac1ea9..aca577aad0 100644
--- a/org.lflang/src/org/lflang/generator/ts/TSReactionGenerator.kt
+++ b/org.lflang/src/org/lflang/generator/ts/TSReactionGenerator.kt
@@ -358,7 +358,7 @@ class TSReactionGenerator(
 
             // Underscores are added to parameter names to prevent conflict with prologue
             val name = param.name
-            reactSignature.add("__$name: __Parameter<${TSTypes.getTargetType(param)}>")
+            reactSignature.add("__$name: __Parameter<${TSTypes.getInstance().getTargetType(param)}>")
             reactFunctArgs.add("this.$name")
             reactPrologue.add("let $name = __$name.get();")
         }
@@ -367,7 +367,7 @@ class TSReactionGenerator(
         for (state in reactor.stateVars) {
             // Underscores are added to state names to prevent conflict with prologue
             val name = state.name
-            reactSignature.add("__$name: __State<${TSTypes.getTargetType(state)}>")
+            reactSignature.add("__$name: __State<${TSTypes.getInstance().getTargetType(state)}>")
             reactFunctArgs.add("this.$name")
             reactPrologue.add("let $name = __$name.get();")
             reactEpilogue.add(
diff --git a/org.lflang/src/org/lflang/generator/ts/TSStateGenerator.kt b/org.lflang/src/org/lflang/generator/ts/TSStateGenerator.kt
index 091da1d958..6ac2d8b28a 100644
--- a/org.lflang/src/org/lflang/generator/ts/TSStateGenerator.kt
+++ b/org.lflang/src/org/lflang/generator/ts/TSStateGenerator.kt
@@ -15,7 +15,7 @@ class TSStateGenerator(
     fun generateClassProperties(): String {
         val stateClassProperties = LinkedList<String>()
         for (stateVar in stateVars) {
-            stateClassProperties.add("${stateVar.name}: __State<${TSTypes.getTargetType(stateVar)}>;");
+            stateClassProperties.add("${stateVar.name}: __State<${TSTypes.getInstance().getTargetType(stateVar)}>;");
         }
         return stateClassProperties.joinToString("\n")
     }
@@ -25,7 +25,7 @@ class TSStateGenerator(
         // Next handle states.
         for (stateVar in stateVars) {
             if (ASTUtils.isInitialized(stateVar)) {
-                stateInstantiations.add("this.${stateVar.name} = new __State(${TSTypes.getTargetInitializer(stateVar)});");
+                stateInstantiations.add("this.${stateVar.name} = new __State(${TSTypes.getInstance().getTargetInitializer(stateVar)});");
             } else {
                 stateInstantiations.add("this.${stateVar.name} = new __State(undefined);");
             }
diff --git a/org.lflang/src/org/lflang/generator/ts/TSTypes.java b/org.lflang/src/org/lflang/generator/ts/TSTypes.java
index 6a44b07627..e89fff00d4 100644
--- a/org.lflang/src/org/lflang/generator/ts/TSTypes.java
+++ b/org.lflang/src/org/lflang/generator/ts/TSTypes.java
@@ -9,7 +9,13 @@
 import org.lflang.lf.StateVar;
 
 public class TSTypes implements TargetTypes {
-    
+
+    private static TSTypes INSTANCE = new TSTypes();
+
+    private TSTypes() {
+
+    }
+
     @Override
     public String getTargetType(StateVar s) {
         var type = TargetTypes.super.getTargetType(s);
@@ -62,4 +68,8 @@ public String getTargetVariableSizeListType(String baseType) {
     public String getVariableSizeListInitExpression(List<String> contents, boolean withBraces) {
         return "[" + String.join(", ", contents) + "]";
     }
+
+    public static TSTypes getInstance() {
+        return INSTANCE;
+    }
 }