diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 80ed9dc7..d97009dd 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -23,6 +23,12 @@ Changed
   or ``b+02`` is used to indicate the exponent then the value and
   uncertainty are always wrapped in parentheses.
 
+Fixed
+^^^^^
+
+* Correct ``fit_plot_with_sciform.py`` example script to use new
+  ``exp_format=ExpFormat.PREFIX`` instead of old ``prefix_exp=True``.
+
 Improved
 ^^^^^^^^
 
diff --git a/examples/fit_plot_with_sciform.py b/examples/fit_plot_with_sciform.py
index 0b04756d..493d480c 100644
--- a/examples/fit_plot_with_sciform.py
+++ b/examples/fit_plot_with_sciform.py
@@ -7,7 +7,8 @@
 from scipy.optimize import curve_fit
 from tabulate import tabulate
 
-from sciform import Formatter, ExpMode, RoundMode, SignMode, FormatOptions
+from sciform import (Formatter, ExpMode, RoundMode, SignMode, FormatOptions,
+                     ExpFormat)
 
 
 def get_scale_and_offset_from_offset_str(
@@ -54,11 +55,11 @@ def prefix_exp_ticks(ax: plt.Axes, axis: Literal['x', 'y'],
         exp_mode = ExpMode.ENGINEERING_SHIFTED
     tick_formatter = Formatter(FormatOptions(
         exp_mode=exp_mode,
-        prefix_exp=True))
+        exp_format=ExpFormat.PREFIX))
     offset_formatter = Formatter(FormatOptions(
         sign_mode=SignMode.ALWAYS,
         exp_mode=exp_mode,
-        prefix_exp=True))
+        exp_format=ExpFormat.PREFIX))
 
     ax.ticklabel_format(axis=axis, style='sci')