diff --git a/extensions/phal/create_pel.cpp b/extensions/phal/create_pel.cpp
index c10f32c..b1557e7 100644
--- a/extensions/phal/create_pel.cpp
+++ b/extensions/phal/create_pel.cpp
@@ -80,7 +80,7 @@
         throw std::runtime_error(
             "Error in invoking D-Bus logging create interface");
     }
-    catch (std::exception& e)
+    catch (const std::exception& e)
     {
         throw e;
     }
@@ -138,7 +138,7 @@
         throw std::runtime_error(
             "Error in invoking D-Bus logging create interface");
     }
-    catch (std::exception& e)
+    catch (const std::exception& e)
     {
         throw e;
     }
@@ -180,7 +180,7 @@
         throw std::runtime_error(
             "Error in invoking D-Bus logging create interface");
     }
-    catch (std::exception& e)
+    catch (const std::exception& e)
     {
         log<level::ERR>(
             fmt::format("D-bus call exception", "EXCEPTION={}", e.what())
diff --git a/extensions/phal/devtree_export.cpp b/extensions/phal/devtree_export.cpp
index 922c341..ad21332 100644
--- a/extensions/phal/devtree_export.cpp
+++ b/extensions/phal/devtree_export.cpp
@@ -23,7 +23,7 @@
         // Watch for software update
         eventRet = event.loop();
     }
-    catch (std::exception& e)
+    catch (const std::exception& e)
     {
         using namespace phosphor::logging;
         log<level::ERR>(
diff --git a/extensions/phal/fw_update_watch.cpp b/extensions/phal/fw_update_watch.cpp
index 2c6f813..b778734 100644
--- a/extensions/phal/fw_update_watch.cpp
+++ b/extensions/phal/fw_update_watch.cpp
@@ -91,7 +91,7 @@
             // Colect device tree data
             openpower::phal::fwupdate::exportDevtree();
         }
-        catch (fs::filesystem_error& e)
+        catch (const fs::filesystem_error& e)
         {
             log<level::ERR>(
                 fmt::format("Filesystem error reported Error:({})", e.what())
diff --git a/extensions/phal/phal_error.cpp b/extensions/phal/phal_error.cpp
index d769d11..b6dc1d7 100644
--- a/extensions/phal/phal_error.cpp
+++ b/extensions/phal/phal_error.cpp
@@ -492,7 +492,7 @@
         openpower::pel::createBootErrorPEL(pelAdditionalData,
                                            jsonCalloutDataList);
     }
-    catch (std::exception& ex)
+    catch (const std::exception& ex)
     {
         reset();
         throw ex;
@@ -595,7 +595,7 @@
             logLevel = std::stoi(env_p);
         }
     }
-    catch (std::exception& e)
+    catch (const std::exception& e)
     {
         log<level::ERR>(("Conversion Failure"), entry("ENVIRONMENT=%s", env),
                         entry("EXCEPTION=%s", e.what()));