diff --git a/core/src/main/java/com/predic8/membrane/core/interceptor/flow/ConditionalInterceptor.java b/core/src/main/java/com/predic8/membrane/core/interceptor/flow/ConditionalInterceptor.java
index 69073f3e9..2d76db2e7 100644
--- a/core/src/main/java/com/predic8/membrane/core/interceptor/flow/ConditionalInterceptor.java
+++ b/core/src/main/java/com/predic8/membrane/core/interceptor/flow/ConditionalInterceptor.java
@@ -23,6 +23,8 @@
 import com.predic8.membrane.core.lang.spel.*;
 import org.slf4j.*;
 import org.springframework.expression.*;
+import org.springframework.expression.spel.SpelCompilerMode;
+import org.springframework.expression.spel.SpelParserConfiguration;
 import org.springframework.expression.spel.standard.*;
 
 import java.util.*;
@@ -61,6 +63,7 @@ public class ConditionalInterceptor extends AbstractFlowInterceptor {
     /**
      * Spring Expression Language
      */
+    private final SpelParserConfiguration spelConfig = new SpelParserConfiguration(SpelCompilerMode.IMMEDIATE, this.getClass().getClassLoader());
     private Expression spelExpr;
 
     private final InterceptorFlowController interceptorFlowController = new InterceptorFlowController();
@@ -82,7 +85,7 @@ public void init(Router router) throws Exception {
         switch (language) {
             case GROOVY ->
                     condition = new GroovyLanguageSupport().compileExpression(router.getBackgroundInitializator(), null, test);
-            case SPEL -> spelExpr = new SpelExpressionParser().parseExpression(test);
+            case SPEL -> spelExpr = new SpelExpressionParser(spelConfig).parseExpression(test);
 
         }
     }
diff --git a/core/src/main/java/com/predic8/membrane/core/interceptor/log/AdditionalVariable.java b/core/src/main/java/com/predic8/membrane/core/interceptor/log/AdditionalVariable.java
index 05994fadf..0110f4f8b 100644
--- a/core/src/main/java/com/predic8/membrane/core/interceptor/log/AdditionalVariable.java
+++ b/core/src/main/java/com/predic8/membrane/core/interceptor/log/AdditionalVariable.java
@@ -19,11 +19,14 @@
 import com.predic8.membrane.annot.MCElement;
 import com.predic8.membrane.annot.Required;
 import org.springframework.expression.Expression;
+import org.springframework.expression.spel.SpelCompilerMode;
+import org.springframework.expression.spel.SpelParserConfiguration;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
 
 @MCElement(name = "additionalVariable", topLevel = false, id = "accessLog-scope")
 public class AdditionalVariable {
 
+    private final SpelParserConfiguration spelConfig = new SpelParserConfiguration(SpelCompilerMode.IMMEDIATE, this.getClass().getClassLoader());
     private String name;
     private Expression expression;
     private String defaultValue = "-";
@@ -39,7 +42,7 @@ public Expression getExpression() {
     @Required
     @MCAttribute
     public void setExpression(String expression) {
-        this.expression = new SpelExpressionParser()
+        this.expression = new SpelExpressionParser(spelConfig)
                 .parseExpression(expression);
     }
 
diff --git a/core/src/main/java/com/predic8/membrane/core/interceptor/misc/AbstractSetterInterceptor.java b/core/src/main/java/com/predic8/membrane/core/interceptor/misc/AbstractSetterInterceptor.java
index 99985168b..742ee1fba 100644
--- a/core/src/main/java/com/predic8/membrane/core/interceptor/misc/AbstractSetterInterceptor.java
+++ b/core/src/main/java/com/predic8/membrane/core/interceptor/misc/AbstractSetterInterceptor.java
@@ -23,6 +23,8 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.expression.ExpressionParser;
+import org.springframework.expression.spel.SpelCompilerMode;
+import org.springframework.expression.spel.SpelParserConfiguration;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
 import org.springframework.expression.spel.support.StandardEvaluationContext;
 
@@ -35,7 +37,8 @@
 public abstract class AbstractSetterInterceptor extends AbstractInterceptor {
 
     private static final Logger log = LoggerFactory.getLogger(AbstractSetterInterceptor.class);
-    private static final ExpressionParser parser = new SpelExpressionParser();
+    private final SpelParserConfiguration spelConfig = new SpelParserConfiguration(SpelCompilerMode.IMMEDIATE, this.getClass().getClassLoader());
+    private final ExpressionParser parser = new SpelExpressionParser(spelConfig);
     private final Pattern expressionPattern = Pattern.compile("\\$\\{(.*?)}");
 
     protected String name;
diff --git a/core/src/main/java/com/predic8/membrane/core/interceptor/oauth2client/OAuth2PermissionCheckerInterceptor.java b/core/src/main/java/com/predic8/membrane/core/interceptor/oauth2client/OAuth2PermissionCheckerInterceptor.java
index ce75d3a86..d41e208c3 100644
--- a/core/src/main/java/com/predic8/membrane/core/interceptor/oauth2client/OAuth2PermissionCheckerInterceptor.java
+++ b/core/src/main/java/com/predic8/membrane/core/interceptor/oauth2client/OAuth2PermissionCheckerInterceptor.java
@@ -26,6 +26,8 @@
 import com.predic8.membrane.annot.Required;
 import org.springframework.expression.Expression;
 import org.springframework.expression.ExpressionParser;
+import org.springframework.expression.spel.SpelCompilerMode;
+import org.springframework.expression.spel.SpelParserConfiguration;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
 import org.springframework.expression.spel.support.StandardEvaluationContext;
 
@@ -39,6 +41,7 @@ public class OAuth2PermissionCheckerInterceptor extends AbstractInterceptor {
 
     private static final Logger log = LoggerFactory.getLogger(OAuth2PermissionCheckerInterceptor.class);
 
+    private final SpelParserConfiguration spelConfig = new SpelParserConfiguration(SpelCompilerMode.IMMEDIATE, this.getClass().getClassLoader());
     String expression;
     ValueSource valueSource;
     Function<Object, Boolean> valueChecker;
@@ -105,7 +108,7 @@ public Object evaluate(Exchange exc) {
     }
 
     private Function<Object, Boolean> createChecker(String expr) {
-        ExpressionParser parser = new SpelExpressionParser();
+        ExpressionParser parser = new SpelExpressionParser(spelConfig);
         Expression exp = parser.parseExpression(expr);
 
         return param -> {
diff --git a/core/src/main/java/com/predic8/membrane/core/interceptor/ratelimit/RateLimitInterceptor.java b/core/src/main/java/com/predic8/membrane/core/interceptor/ratelimit/RateLimitInterceptor.java
index 6b5cd8d32..fb8da37ee 100644
--- a/core/src/main/java/com/predic8/membrane/core/interceptor/ratelimit/RateLimitInterceptor.java
+++ b/core/src/main/java/com/predic8/membrane/core/interceptor/ratelimit/RateLimitInterceptor.java
@@ -69,6 +69,7 @@ public class RateLimitInterceptor extends AbstractInterceptor {
 
     private final RateLimitStrategy strategy;
 
+    private final SpelParserConfiguration spelConfig = new SpelParserConfiguration(SpelCompilerMode.IMMEDIATE, this.getClass().getClassLoader());
     private String keyExpression;
     private Expression expression;
 
@@ -125,7 +126,7 @@ public void init() throws Exception {
         super.init();
         if (keyExpression == null || keyExpression.isBlank())
             return;
-        expression = new SpelExpressionParser().parseExpression(keyExpression);
+        expression = new SpelExpressionParser(spelConfig).parseExpression(keyExpression);
     }
 
     private String getKey(Exchange exc) {
diff --git a/core/src/main/java/com/predic8/membrane/core/openapi/serviceproxy/APIProxyKey.java b/core/src/main/java/com/predic8/membrane/core/openapi/serviceproxy/APIProxyKey.java
index fc9945c11..5e29f2973 100644
--- a/core/src/main/java/com/predic8/membrane/core/openapi/serviceproxy/APIProxyKey.java
+++ b/core/src/main/java/com/predic8/membrane/core/openapi/serviceproxy/APIProxyKey.java
@@ -21,6 +21,8 @@
 import com.predic8.membrane.core.rules.*;
 import org.slf4j.*;
 import org.springframework.expression.*;
+import org.springframework.expression.spel.SpelCompilerMode;
+import org.springframework.expression.spel.SpelParserConfiguration;
 import org.springframework.expression.spel.standard.*;
 
 import java.util.*;
@@ -33,6 +35,7 @@ public class APIProxyKey extends ServiceProxyKey {
 
     private final ArrayList<String> basePaths = new ArrayList<>();
 
+    private final SpelParserConfiguration spelConfig = new SpelParserConfiguration(SpelCompilerMode.IMMEDIATE, this.getClass().getClassLoader());
     private Expression testExpr;
 
     public APIProxyKey(RuleKey key, String test, boolean openAPI) {
@@ -49,7 +52,7 @@ public APIProxyKey(String ip, String host, int port, String path, String method,
 
     protected void init(String test, boolean openAPI) {
         if (test != null)
-            testExpr = new SpelExpressionParser().parseExpression(test);
+            testExpr = new SpelExpressionParser(spelConfig).parseExpression(test);
 
         if (!openAPI)
             return;
diff --git a/core/src/test/java/com/predic8/membrane/core/interceptor/ratelimit/RateLimitInterceptorTest.java b/core/src/test/java/com/predic8/membrane/core/interceptor/ratelimit/RateLimitInterceptorTest.java
index c24b734d7..580adf3f0 100644
--- a/core/src/test/java/com/predic8/membrane/core/interceptor/ratelimit/RateLimitInterceptorTest.java
+++ b/core/src/test/java/com/predic8/membrane/core/interceptor/ratelimit/RateLimitInterceptorTest.java
@@ -351,9 +351,9 @@ void rateLimitInitWithoutKeyExpression() throws Exception {
 	 */
 
 	@NotNull
-	private static Exchange getExchange() {
+	private static Exchange getExchange() throws URISyntaxException {
 		final Exchange exc = new Exchange(null);
-		exc.setRequest(new Request.Builder().header("accept","*/*").build());
+		exc.setRequest(new Request.Builder().get("/").header("accept","*/*").build());
 		exc.setResponse(Response.ok().build());
 		exc.setRemoteAddrIp("192.168.1.100");
 		return exc;