diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1ce62a8..477f410 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- [#3](https://github.com/green-code-initiative/ecoCode-java/issues/3) Improvement: pattern declaration not only in a static way
+
 ### Deleted
 
 ## [1.6.1] - 2024-05-15
diff --git a/src/main/java/fr/greencodeinitiative/java/checks/AvoidRegexPatternNotStatic.java b/src/main/java/fr/greencodeinitiative/java/checks/AvoidRegexPatternNotStatic.java
index 2561a6c..8f68d0c 100644
--- a/src/main/java/fr/greencodeinitiative/java/checks/AvoidRegexPatternNotStatic.java
+++ b/src/main/java/fr/greencodeinitiative/java/checks/AvoidRegexPatternNotStatic.java
@@ -26,6 +26,7 @@
 import org.sonar.check.Rule;
 import org.sonar.plugins.java.api.IssuableSubscriptionVisitor;
 import org.sonar.plugins.java.api.semantic.MethodMatchers;
+import org.sonar.plugins.java.api.tree.Arguments;
 import org.sonar.plugins.java.api.tree.BaseTreeVisitor;
 import org.sonar.plugins.java.api.tree.MethodInvocationTree;
 import org.sonar.plugins.java.api.tree.MethodTree;
@@ -66,7 +67,9 @@ private class AvoidRegexPatternNotStaticVisitor extends BaseTreeVisitor {
 
         @Override
         public void visitMethodInvocation(@Nonnull MethodInvocationTree tree) {
-            if (PATTERN_COMPILE.matches(tree)) {
+            Arguments arguments = tree.arguments();
+            boolean isArgumentStringLitteral = !arguments.isEmpty() && arguments.get(0).is(Tree.Kind.STRING_LITERAL);
+            if (PATTERN_COMPILE.matches(tree) && isArgumentStringLitteral){
                 reportIssue(tree, MESSAGE_RULE);
             } else {
                 super.visitMethodInvocation(tree);
diff --git a/src/test/files/ValidParamRegexPattern.java b/src/test/files/ValidParamRegexPattern.java
new file mode 100644
index 0000000..db73e09
--- /dev/null
+++ b/src/test/files/ValidParamRegexPattern.java
@@ -0,0 +1,28 @@
+/*
+ * ecoCode - Java language - Provides rules to reduce the environmental footprint of your Java programs
+ * Copyright © 2023 Green Code Initiative (https://www.ecocode.io)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package fr.greencodeinitiative.java.checks;
+
+import java.util.regex.Pattern;
+
+public class ValidParamRegexPattern {
+
+    public void epjPatternWithParam(String codeEpj) {
+        final Pattern pattern = Pattern.compile("\"codeEpj\"\\s*:\\s" + codeEpj + ","); // Compliant - Pattern is used with a parameter
+        final Pattern pattern2 = Pattern.compile(codeEpj); // Compliant - Pattern is used with a parameter
+    }
+}
diff --git a/src/test/java/fr/greencodeinitiative/java/checks/AvoidRegexPatternNotStaticTest.java b/src/test/java/fr/greencodeinitiative/java/checks/AvoidRegexPatternNotStaticTest.java
index 1750232..9ae2454 100644
--- a/src/test/java/fr/greencodeinitiative/java/checks/AvoidRegexPatternNotStaticTest.java
+++ b/src/test/java/fr/greencodeinitiative/java/checks/AvoidRegexPatternNotStaticTest.java
@@ -36,7 +36,8 @@ void testHasNoIssues() {
                 .onFiles(
                         "src/test/files/ValidRegexPattern.java",
                         "src/test/files/ValidRegexPattern2.java",
-                        "src/test/files/ValidRegexPattern3.java"
+                        "src/test/files/ValidRegexPattern3.java",
+                        "src/test/files/ValidParamRegexPattern.java"
                 )
                 .withCheck(new AvoidRegexPatternNotStatic())
                 .verifyNoIssues();