diff --git a/src/main/resources/META-INF/rewrite/bouncycastle-jdk15to18.yml b/src/main/resources/META-INF/rewrite/bouncycastle-jdk15to18.yml
new file mode 100644
index 0000000000..40670c2059
--- /dev/null
+++ b/src/main/resources/META-INF/rewrite/bouncycastle-jdk15to18.yml
@@ -0,0 +1,62 @@
+#
+# Copyright 2025 the original author or authors.
+# <p>
+# Licensed under the Moderne Source Available License (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+# <p>
+# https://docs.moderne.io/licensing/moderne-source-available-license
+# <p>
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+---
+type: specs.openrewrite.org/v1beta/recipe
+name: org.openrewrite.java.migrate.BouncyCastleFromJdk15OnToJdk15to18
+displayName: Migrate Bouncy Castle from `jdk15on` to `jdk15to18` for Java < 8
+description: >-
+  This recipe replaces the Bouncy Castle artifacts from `jdk15on` to `jdk15to18`.
+  `jdk15on` isn't maintained anymore and `jdk18on` is only for Java 8 and above.
+  The `jdk15to18` artifact is the up-to-date replacement of the unmaintained `jdk15on` for Java < 8.
+tags:
+  - bouncycastle
+recipeList:
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcprov-jdk15on
+      newArtifactId: bcprov-jdk15to18
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcutil-jdk15on
+      newArtifactId: bcutil-jdk15to18
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcpkix-jdk15on
+      newArtifactId: bcpkix-jdk15to18
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcmail-jdk15on
+      newArtifactId: bcmail-jdk15to18
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcjmail-jdk15on
+      newArtifactId: bcjmail-jdk15to18
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcpg-jdk15on
+      newArtifactId: bcpg-jdk15to18
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bctls-jdk15on
+      newArtifactId: bctls-jdk15to18
+      newVersion: latest.release
diff --git a/src/main/resources/META-INF/rewrite/bouncycastle-jdk18on.yml b/src/main/resources/META-INF/rewrite/bouncycastle-jdk18on.yml
index 2b3a17aa91..d07be0a142 100644
--- a/src/main/resources/META-INF/rewrite/bouncycastle-jdk18on.yml
+++ b/src/main/resources/META-INF/rewrite/bouncycastle-jdk18on.yml
@@ -17,12 +17,13 @@
 ---
 type: specs.openrewrite.org/v1beta/recipe
 name: org.openrewrite.java.migrate.BounceCastleFromJdk15OntoJdk18On
-displayName: Migrate BouncyCastle to jdk18on
+displayName: Migrate Bouncy Castle to `jdk18on`
 description: >-
-  This recipe will upgrade BouncyCastle dependencies from -jdk15on to -jdk18on.
+  This recipe will upgrade Bouncy Castle dependencies from `-jdk15on` or `-jdk15to18` to `-jdk18on`.
 tags:
   - bouncycastle
 recipeList:
+  # -jdk15on migration
   - org.openrewrite.java.dependencies.ChangeDependency:
       oldGroupId: org.bouncycastle
       oldArtifactId: bcprov-jdk15on
@@ -58,3 +59,40 @@ recipeList:
       oldArtifactId: bctls-jdk15on
       newArtifactId: bctls-jdk18on
       newVersion: latest.release
+
+  # -jdk15to18 migration
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcprov-jdk15to18
+      newArtifactId: bcprov-jdk18on
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcutil-jdk15to18
+      newArtifactId: bcutil-jdk18on
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcpkix-jdk15to18
+      newArtifactId: bcpkix-jdk18on
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcmail-jdk15to18
+      newArtifactId: bcmail-jdk18on
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcjmail-jdk15to18
+      newArtifactId: bcjmail-jdk18on
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bcpg-jdk15to18
+      newArtifactId: bcpg-jdk18on
+      newVersion: latest.release
+  - org.openrewrite.java.dependencies.ChangeDependency:
+      oldGroupId: org.bouncycastle
+      oldArtifactId: bctls-jdk15to18
+      newArtifactId: bctls-jdk18on
+      newVersion: latest.release
diff --git a/src/main/resources/META-INF/rewrite/java-version-7.yml b/src/main/resources/META-INF/rewrite/java-version-7.yml
index 2edceffe7d..1c75bfd50b 100644
--- a/src/main/resources/META-INF/rewrite/java-version-7.yml
+++ b/src/main/resources/META-INF/rewrite/java-version-7.yml
@@ -28,6 +28,7 @@ recipeList:
   - org.openrewrite.java.migrate.JREJdbcInterfaceNewMethods
   - org.openrewrite.java.migrate.JREThrowableFinalMethods
   - org.openrewrite.java.migrate.util.ReplaceMathRandomWithThreadLocalRandomRecipe
+  - org.openrewrite.java.migrate.BouncyCastleFromJdk15OnToJdk15to18
 ---
 type: specs.openrewrite.org/v1beta/recipe
 name: org.openrewrite.java.migrate.JREJdbcInterfaceNewMethods
@@ -69,4 +70,4 @@ recipeList:
   - org.openrewrite.java.migrate.AddMissingMethodImplementation:
       fullyQualifiedClassName: javax.sql.CommonDataSource
       methodPattern: "*..* getParentLogger()"
-      methodTemplateString: "public java.util.logging.Logger getParentLogger() { \n\t// TODO Auto-generated method stub\n return null; }"
\ No newline at end of file
+      methodTemplateString: "public java.util.logging.Logger getParentLogger() { \n\t// TODO Auto-generated method stub\n return null; }"
diff --git a/src/test/java/org/openrewrite/java/migrate/BouncyCastleTest.java b/src/test/java/org/openrewrite/java/migrate/BouncyCastleTest.java
index ea504b57f9..aaa4180c52 100644
--- a/src/test/java/org/openrewrite/java/migrate/BouncyCastleTest.java
+++ b/src/test/java/org/openrewrite/java/migrate/BouncyCastleTest.java
@@ -17,13 +17,15 @@
 
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
-import org.junit.jupiter.params.provider.ValueSource;
+import org.junit.jupiter.params.provider.MethodSource;
 import org.openrewrite.DocumentExample;
 import org.openrewrite.maven.tree.MavenResolutionResult;
 import org.openrewrite.maven.tree.Scope;
-import org.openrewrite.test.RecipeSpec;
 import org.openrewrite.test.RewriteTest;
 
+import java.util.Arrays;
+import java.util.List;
+
 import static java.util.function.UnaryOperator.identity;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.openrewrite.java.Assertions.mavenProject;
@@ -31,28 +33,26 @@
 
 class BouncyCastleTest implements RewriteTest {
 
-    @Override
-    public void defaults(RecipeSpec spec) {
-        spec.recipeFromResource(
-          "/META-INF/rewrite/bouncycastle-jdk18on.yml",
-          "org.openrewrite.java.migrate.BounceCastleFromJdk15OntoJdk18On");
+    static List<String> artifactBaseNames() {
+        return Arrays.asList("bcprov", "bcutil", "bcpkix", "bcmail", "bcjmail", "bcpg", "bctls");
     }
 
     @DocumentExample
     @Test
     void document() {
         rewriteRun(
+          spec -> spec.recipeFromResource(
+            "/META-INF/rewrite/bouncycastle-jdk18on.yml",
+            "org.openrewrite.java.migrate.BounceCastleFromJdk15OntoJdk18On"),
           mavenProject("project",
             //language=xml
             pomXml(
               """
                 <project>
                   <modelVersion>4.0.0</modelVersion>
-
                   <groupId>com.mycompany.app</groupId>
                   <artifactId>my-app</artifactId>
                   <version>1</version>
-
                   <dependencies>
                     <dependency>
                       <groupId>org.bouncycastle</groupId>
@@ -86,31 +86,68 @@ void document() {
         );
     }
 
+    @ParameterizedTest
+    @MethodSource("artifactBaseNames")
+    void jdk15onToJdk18on(String artifactBaseName) {
+        runBouncyCastleArtifactUpgradeRecipe(
+          "/META-INF/rewrite/bouncycastle-jdk18on.yml",
+          "org.openrewrite.java.migrate.BounceCastleFromJdk15OntoJdk18On",
+          artifactBaseName,
+          "jdk15on",
+          "jdk18on"
+        );
+    }
 
     @ParameterizedTest
-    @ValueSource(strings = {"bcprov", "bcutil", "bcpkix", "bcmail", "bcjmail", "bcpg", "bctls"})
-    void updateBouncyCastle(String value) {
+    @MethodSource("artifactBaseNames")
+    void jdk15to18ToJdk18on(String artifactBaseName) {
+        runBouncyCastleArtifactUpgradeRecipe(
+          "/META-INF/rewrite/bouncycastle-jdk18on.yml",
+          "org.openrewrite.java.migrate.BounceCastleFromJdk15OntoJdk18On",
+          artifactBaseName,
+          "jdk15to18",
+          "jdk18on"
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("artifactBaseNames")
+    void jdk15onToJdk15To18(String artifactBaseName) {
+        runBouncyCastleArtifactUpgradeRecipe(
+          "/META-INF/rewrite/bouncycastle-jdk15to18.yml",
+          "org.openrewrite.java.migrate.BouncyCastleFromJdk15OnToJdk15to18",
+          artifactBaseName,
+          "jdk15on",
+          "jdk15to18"
+        );
+    }
+
+    void runBouncyCastleArtifactUpgradeRecipe(
+      String yamlFile,
+      String recipe,
+      String baseArtifactId,
+      String originalArtifactSuffix,
+      String expectedArtifactSuffix) {
         rewriteRun(
+          recipeSpec -> recipeSpec.recipeFromResource(yamlFile, recipe),
           mavenProject("project",
             //language=xml
             pomXml(
-                    """
+              """
                 <project>
                   <modelVersion>4.0.0</modelVersion>
-
                   <groupId>com.mycompany.app</groupId>
                   <artifactId>my-app</artifactId>
                   <version>1</version>
-
                   <dependencies>
                     <dependency>
                       <groupId>org.bouncycastle</groupId>
-                      <artifactId>%s-jdk15on</artifactId>
+                      <artifactId>%s-%s</artifactId>
                       <version>1.70</version>
                     </dependency>
                   </dependencies>
                 </project>
-                """.formatted(value),
+                """.formatted(baseArtifactId, originalArtifactSuffix),
               spec -> spec
                 .after(identity())
                 .afterRecipe(doc -> assertThat(doc.getMarkers().findFirst(MavenResolutionResult.class)
@@ -119,7 +156,7 @@ void updateBouncyCastle(String value) {
                   .singleElement()
                   .satisfies(rd -> {
                       assertThat(rd.getGroupId()).isEqualTo("org.bouncycastle");
-                      assertThat(rd.getArtifactId()).isEqualTo(value + "-jdk18on");
+                      assertThat(rd.getArtifactId()).isEqualTo(String.format("%s-%s", baseArtifactId, expectedArtifactSuffix));
                   }))
             )
           )