diff --git a/SEP_Spectra.ipynb b/SEP_Spectra.ipynb
index a47c8b1..547d2d2 100644
--- a/SEP_Spectra.ipynb
+++ b/SEP_Spectra.ipynb
@@ -312,8 +312,8 @@
    "id": "14",
    "metadata": {},
    "source": [
-    "## 6. Temporal evolution of peak spectrum\n",
-    "This will automatically assume `spectral_type = 'peak'`.\n",
+    "## 6. Temporal evolution of integral spectrum\n",
+    "This will automatically assume `spectral_type = 'integral'`.\n",
     "\n",
     "### 6.1 Determine time interval and duration for spectra slices and show in time series plot"
    ]
@@ -355,7 +355,7 @@
    "id": "16",
    "metadata": {},
    "source": [
-    "### 6.2 Determine peak spectrum for each time slice and display animated gif\n",
+    "### 6.2 Determine integral spectrum for each time slice and display animated gif\n",
     "Output files (.csv and .png) are saved in a subfolder \"output_spectra\"."
    ]
   },