diff --git a/docs-core/src/main/java/com/sismics/util/io/InputStreamReaderThread.java b/docs-core/src/main/java/com/sismics/util/io/InputStreamReaderThread.java
index 23c3819b..ff2da29d 100644
--- a/docs-core/src/main/java/com/sismics/util/io/InputStreamReaderThread.java
+++ b/docs-core/src/main/java/com/sismics/util/io/InputStreamReaderThread.java
@@ -34,7 +34,9 @@ public class InputStreamReaderThread extends Thread {
         try {
             BufferedReader reader = closer.register(new BufferedReader(new InputStreamReader(is)));
             for (String line = reader.readLine(); line != null; line = reader.readLine()) {
-                logger.info(String.format(name + ": %s", line));
+                if (logger.isDebugEnabled()) {
+                    logger.debug(String.format(name + ": %s", line));
+                }
             }
         } catch (IOException x) {
             // NOP