diff --git a/notebooks/WFC3/exception_report/wfc3_exception_report.ipynb b/notebooks/WFC3/exception_report/wfc3_exception_report.ipynb
index afc9deb73..19b5fbf42 100755
--- a/notebooks/WFC3/exception_report/wfc3_exception_report.ipynb
+++ b/notebooks/WFC3/exception_report/wfc3_exception_report.ipynb
@@ -409,7 +409,7 @@
     "figure_size = (7, 5) # Edit if you want to chage the figure size\n",
     "dotsperinch = 115   # Edit if you want to change the figure resolution\n",
     "\n",
-    "for ext in range(1,numexts+1):\n",
+    "for ext in range(1, numexts+1):\n",
     "\n",
     "    jit_tbl = Table(fits.getdata(jit_file, ext))\n",
     "    expname = fits.getheader(jit_file, ext)['EXPNAME']\n",