diff --git a/arpack/pom.xml b/arpack/pom.xml
index 50ef839..d3de301 100644
--- a/arpack/pom.xml
+++ b/arpack/pom.xml
@@ -42,7 +42,7 @@ information or have any questions.
   <packaging>jar</packaging>
 
   <properties>
-    <junit.version>5.8.2</junit.version>
+    <junit.version>5.13.4</junit.version>
     <automatic.module.name>dev.ludovic.netlib.arpack</automatic.module.name>
   </properties>
 
diff --git a/arpack/src/main/java/dev/ludovic/netlib/arpack/InstanceBuilder.java b/arpack/src/main/java/dev/ludovic/netlib/arpack/InstanceBuilder.java
index 0e69aa2..b591a4b 100644
--- a/arpack/src/main/java/dev/ludovic/netlib/arpack/InstanceBuilder.java
+++ b/arpack/src/main/java/dev/ludovic/netlib/arpack/InstanceBuilder.java
@@ -25,6 +25,7 @@
 
 package dev.ludovic.netlib.arpack;
 
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 final class InstanceBuilder {
@@ -39,6 +40,8 @@ final class InstanceBuilder {
     nativeArpack = initializeNative();
     javaArpack = initializeJava();
     arpack = nativeArpack != null ? nativeArpack : javaArpack;
+
+    log.info("Using " + arpack.getClass().getName());
   }
 
   public static ARPACK arpack() {
@@ -49,7 +52,7 @@ private static NativeARPACK initializeNative() {
     try {
       return JNIARPACK.getInstance();
     } catch (Throwable t) {
-      log.warning("Failed to load implementation from:" + JNIARPACK.class.getName());
+      log.log(Level.FINE, "Failed to load implementation from:" + JNIARPACK.class.getName(), t);
       return null;
     }
   }
diff --git a/arpack/src/main/java/dev/ludovic/netlib/arpack/JNIARPACK.java b/arpack/src/main/java/dev/ludovic/netlib/arpack/JNIARPACK.java
index dea23de..0abeb2b 100644
--- a/arpack/src/main/java/dev/ludovic/netlib/arpack/JNIARPACK.java
+++ b/arpack/src/main/java/dev/ludovic/netlib/arpack/JNIARPACK.java
@@ -25,8 +25,9 @@
 
 package dev.ludovic.netlib.arpack;
 
-import java.io.InputStream;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.StandardCopyOption;
@@ -55,7 +56,7 @@ protected JNIARPACK() {
                   StandardCopyOption.REPLACE_EXISTING);
       temp.toFile().deleteOnExit();
     } catch (IOException e) {
-      throw new RuntimeException("Unable to load native implementation", e);
+      throw new UncheckedIOException("Unable to load native implementation", e);
     }
 
     System.load(temp.toString());
diff --git a/blas/pom.xml b/blas/pom.xml
index 0af504a..2dac2a7 100644
--- a/blas/pom.xml
+++ b/blas/pom.xml
@@ -42,7 +42,7 @@ information or have any questions.
   <packaging>jar</packaging>
 
   <properties>
-    <junit.version>5.8.2</junit.version>
+    <junit.version>5.13.4</junit.version>
     <automatic.module.name>dev.ludovic.netlib.blas</automatic.module.name>
   </properties>
 
diff --git a/blas/src/main/java/dev/ludovic/netlib/blas/InstanceBuilder.java b/blas/src/main/java/dev/ludovic/netlib/blas/InstanceBuilder.java
index e5c1792..236fd84 100644
--- a/blas/src/main/java/dev/ludovic/netlib/blas/InstanceBuilder.java
+++ b/blas/src/main/java/dev/ludovic/netlib/blas/InstanceBuilder.java
@@ -25,6 +25,7 @@
 
 package dev.ludovic.netlib.blas;
 
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 final class InstanceBuilder {
@@ -39,6 +40,8 @@ final class InstanceBuilder {
     nativeBlas = initializeNative();
     javaBlas = initializeJava();
     blas = nativeBlas != null ? nativeBlas : javaBlas;
+
+    log.info("Using " + blas.getClass().getName());
   }
 
   public static BLAS blas() {
@@ -49,7 +52,7 @@ private static NativeBLAS initializeNative() {
     try {
       return JNIBLAS.getInstance();
     } catch (Throwable t) {
-      log.warning("Failed to load implementation from:" + JNIBLAS.class.getName());
+      log.log(Level.FINE, "Failed to load implementation from:" + JNIBLAS.class.getName(), t);
       return null;
     }
   }
@@ -69,16 +72,15 @@ private static JavaBLAS initializeJava() {
         log.finest("trying to return java 16 instance");
         return VectorBLAS.getInstance();
       } catch (Throwable t) {
-        log.warning("Failed to load implementation from:" + VectorBLAS.class.getName());
+        log.log(Level.FINE, "Failed to load implementation from:" + VectorBLAS.class.getName(), t);
       }
     }
     if (major >= 11) {
       log.finest("return java 11 instance");
       return Java11BLAS.getInstance();
-    } else {
-      log.finest("return java 8 instance");
-      return Java8BLAS.getInstance();
     }
+    log.finest("return java 8 instance");
+    return Java8BLAS.getInstance();
   }
 
   public static JavaBLAS javaBlas() {
diff --git a/blas/src/main/java/dev/ludovic/netlib/blas/JNIBLAS.java b/blas/src/main/java/dev/ludovic/netlib/blas/JNIBLAS.java
index 7cd5d71..b573dfc 100644
--- a/blas/src/main/java/dev/ludovic/netlib/blas/JNIBLAS.java
+++ b/blas/src/main/java/dev/ludovic/netlib/blas/JNIBLAS.java
@@ -25,8 +25,9 @@
 
 package dev.ludovic.netlib.blas;
 
-import java.io.InputStream;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.StandardCopyOption;
@@ -55,7 +56,7 @@ protected JNIBLAS() {
                   StandardCopyOption.REPLACE_EXISTING);
       temp.toFile().deleteOnExit();
     } catch (IOException e) {
-      throw new RuntimeException("Unable to load native implementation", e);
+      throw new UncheckedIOException("Unable to load native implementation", e);
     }
 
     System.load(temp.toString());
diff --git a/lapack/pom.xml b/lapack/pom.xml
index be3019b..3b780eb 100644
--- a/lapack/pom.xml
+++ b/lapack/pom.xml
@@ -42,7 +42,7 @@ information or have any questions.
   <packaging>jar</packaging>
 
   <properties>
-    <junit.version>5.8.2</junit.version>
+    <junit.version>5.13.4</junit.version>
     <automatic.module.name>dev.ludovic.netlib.lapack</automatic.module.name>
   </properties>
 
diff --git a/lapack/src/main/java/dev/ludovic/netlib/lapack/InstanceBuilder.java b/lapack/src/main/java/dev/ludovic/netlib/lapack/InstanceBuilder.java
index 83be7ea..bb0c5ef 100644
--- a/lapack/src/main/java/dev/ludovic/netlib/lapack/InstanceBuilder.java
+++ b/lapack/src/main/java/dev/ludovic/netlib/lapack/InstanceBuilder.java
@@ -25,6 +25,7 @@
 
 package dev.ludovic.netlib.lapack;
 
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 final class InstanceBuilder {
@@ -39,6 +40,8 @@ final class InstanceBuilder {
     nativeLapack = initializeNative();
     javaLapack = initializeJava();
     lapack = nativeLapack != null ? nativeLapack : javaLapack;
+
+    log.info("Using " + lapack.getClass().getName());
   }
 
   public static LAPACK lapack() {
@@ -49,14 +52,14 @@ private static NativeLAPACK initializeNative() {
     try {
       return JNILAPACK.getInstance();
     } catch (Throwable t) {
-      log.warning("Failed to load implementation from:" + JNILAPACK.class.getName());
+      log.log(Level.FINE, "Failed to load implementation from:" + JNILAPACK.class.getName(), t);
       return null;
     }
   }
 
   public static NativeLAPACK nativeLapack() {
     if (nativeLapack == null) {
-      throw new RuntimeException("Unable to load native implementation");
+      throw new RuntimeException("Unable to load native LAPACK implementation");
     }
     return nativeLapack;
   }
diff --git a/lapack/src/main/java/dev/ludovic/netlib/lapack/JNILAPACK.java b/lapack/src/main/java/dev/ludovic/netlib/lapack/JNILAPACK.java
index 04247eb..4e0fbc0 100644
--- a/lapack/src/main/java/dev/ludovic/netlib/lapack/JNILAPACK.java
+++ b/lapack/src/main/java/dev/ludovic/netlib/lapack/JNILAPACK.java
@@ -26,6 +26,7 @@
 package dev.ludovic.netlib.lapack;
 
 import java.io.InputStream;
+import java.io.UncheckedIOException;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
@@ -55,10 +56,11 @@ protected JNILAPACK() {
                   StandardCopyOption.REPLACE_EXISTING);
       temp.toFile().deleteOnExit();
     } catch (IOException e) {
-      throw new RuntimeException("Unable to load native implementation", e);
+      throw new UncheckedIOException("Unable to load native implementation", e);
     }
 
-    System.load(temp.toString());}
+    System.load(temp.toString());
+  }
 
   public static NativeLAPACK getInstance() {
     return instance;