diff --git a/docs/lambda-k-pi/ampform.ipynb b/docs/lambda-k-pi/ampform.ipynb
index 20f95dc..d2e20ad 100644
--- a/docs/lambda-k-pi/ampform.ipynb
+++ b/docs/lambda-k-pi/ampform.ipynb
@@ -483,6 +483,7 @@
     "            description=Rf\"\\({sp.latex(symbol)}\\)\",\n",
     "            min=0.0,\n",
     "            max=1.0,\n",
+    "            step=0.01,\n",
     "            value=value,\n",
     "            continuous_update=False,\n",
     "        )\n",
@@ -499,6 +500,7 @@
     "            description=Rf\"\\({sp.latex(symbol)}\\)\",\n",
     "            min=0.63,\n",
     "            max=4,\n",
+    "            step=0.01,\n",
     "            value=value,\n",
     "            continuous_update=False,\n",
     "        )\n",
@@ -518,6 +520,7 @@
     "            description=Rf\"\\({c_latex}\\)\",\n",
     "            min=0,\n",
     "            max=10,\n",
+    "            step=0.01,\n",
     "            value=abs(value),\n",
     "            continuous_update=False,\n",
     "        )\n",
@@ -525,6 +528,7 @@
     "            description=Rf\"\\({phi_latex}\\)\",\n",
     "            min=-np.pi,\n",
     "            max=+np.pi,\n",
+    "            step=0.01,\n",
     "            value=np.angle(value),\n",
     "            continuous_update=False,\n",
     "        )\n",