diff --git a/CHANGELOG_EN.md b/CHANGELOG_EN.md
index 0d8b5353..1c158232 100644
--- a/CHANGELOG_EN.md
+++ b/CHANGELOG_EN.md
@@ -9,6 +9,9 @@ Supported DBMS:
 
 
 ## [Unreleased]
+### Fixed
+- Bug fix: fixed volumetry line chart display issue
+- Bug fix: fixed invalid JSON response ("select-audits" webscript)
 
 
 ## [1.5.7] - 2018-04-13
diff --git a/CHANGELOG_FR.md b/CHANGELOG_FR.md
index 636d75d3..1e2cbb0d 100644
--- a/CHANGELOG_FR.md
+++ b/CHANGELOG_FR.md
@@ -9,6 +9,9 @@ SGBD support
 
 
 ## [Unreleased]
+### Fixed
+- Correction de l'affichage du graphique de volumétrie en mode "courbe"
+- Correction du retour JSON du webscript "select-audits"
 
 
 ## [1.5.7] - 2018-04-13
diff --git a/module_share/src/main/web/components/atolcd/statistics/volumetry.js b/module_share/src/main/web/components/atolcd/statistics/volumetry.js
index 3b4c226e..4aea0c4f 100644
--- a/module_share/src/main/web/components/atolcd/statistics/volumetry.js
+++ b/module_share/src/main/web/components/atolcd/statistics/volumetry.js
@@ -235,6 +235,9 @@ if (typeof AtolStatistics == "undefined" || !AtolStatistics) {
               }
             },
             y: {
+              // force min value to have similar display between line chart and barchart
+              min: 0,
+              padding: {bottom: 0},
               tick: { format: d3.format("") },
               label: {
                 position: 'outer-middle'