diff --git a/notebooks/STIS/drizpac_notebook/STIS_DrizzlePac_Tutorial.ipynb b/notebooks/STIS/drizpac_notebook/STIS_DrizzlePac_Tutorial.ipynb
index ddcc568be..58c1c0030 100644
--- a/notebooks/STIS/drizpac_notebook/STIS_DrizzlePac_Tutorial.ipynb
+++ b/notebooks/STIS/drizpac_notebook/STIS_DrizzlePac_Tutorial.ipynb
@@ -38,7 +38,7 @@
     "\n",
     "The [Space Telescope Imaging Spectrograph (STIS)](https://www.stsci.edu/hst/instrumentation/stis) instrument on board the _Hubble Space Telescope_ (HST) has three detectors: a charge-coupled device (CCD) and two multi-anode microchannel array (MAMA) detectors for near- and far-ultraviolet wavelengths (NUV MAMA and FUV MAMA respectively). The CCD detector suffers from charge transfer inefficiency (CTI) which can be corrected for directly on the CCD images using a pixel-based algorithm (`stis_cti`; based on work by [Anderson & Bedin 2010](https://ui.adsabs.harvard.edu/abs/2010PASP..122.1035A/abstract), see [webpage](https://www.stsci.edu/hst/instrumentation/stis/data-analysis-and-software-tools/pixel-based-cti)).\n",
     "\n",
-    "In order to maximize the science capabilities of images taken with STIS, they can be accurately aligned and combined (or 'drizzled'). The codes used to do this are from the DrizzlePac package which has been extensively tested on Wide-Field Camera 3 (WFC3) and Advanced Camera for Surveys (ACS) data but was previously unsupported for STIS. This tutorial gives alignment and drizzling examples for STIS images of standard star fields taken for each of its three detectors. We refer users to the [DrizzlePac Handbook](https://www.stsci.edu/scientific-community/software/drizzlepac.html) (Gonzaga et al. 2015, Hoffmann et al. 2021) for more details on the drizzling process and DrizzlePac codes.\n",
+    "In order to maximize the science capabilities of images taken with STIS, they can be accurately aligned and combined (or 'drizzled'). The code used to do this is from the DrizzlePac package which has been extensively tested on Wide-Field Camera 3 (WFC3) and Advanced Camera for Surveys (ACS) data but was previously unsupported for STIS. This tutorial gives alignment and drizzling examples for STIS images of standard star fields taken for each of its three detectors. We refer users to the [DrizzlePac Handbook](https://www.stsci.edu/scientific-community/software/drizzlepac.html) (Gonzaga et al. 2015, Hoffmann et al. 2021) for more details on the drizzling process and DrizzlePac codes.\n",
     "\n",
     "### STIS Data Formats\n",
     "\n",
diff --git a/notebooks/STIS/drizpac_notebook/requirements.txt b/notebooks/STIS/drizpac_notebook/requirements.txt
index 1cad07f60..e33d9f287 100644
--- a/notebooks/STIS/drizpac_notebook/requirements.txt
+++ b/notebooks/STIS/drizpac_notebook/requirements.txt
@@ -5,4 +5,4 @@ ipython==8.11.0
 matplotlib==3.7.0
 numpy==1.23.4
 pandas==1.5.3
-stis_cti==1.1
+stis_cti==1.5