diff --git a/R/update_hyperparameters.R b/R/update_hyperparameters.R
index 76dfff9..6658339 100644
--- a/R/update_hyperparameters.R
+++ b/R/update_hyperparameters.R
@@ -54,14 +54,16 @@
 #'
 #' # 'cost' is required
 #' # throws error
-#' xpectr::capture_side_effects(
-#'   update_hyperparameters(
-#'     kernel = "linear",
-#'     "scale" = FALSE,
-#'     hyperparameters = hparams,
-#'     .required = "cost"
+#' if (requireNamespace("xpectr", quietly = TRUE)){
+#'   xpectr::capture_side_effects(
+#'     update_hyperparameters(
+#'       kernel = "linear",
+#'       "scale" = FALSE,
+#'       hyperparameters = hparams,
+#'       .required = "cost"
+#'     )
 #'   )
-#' )
+#' }
 #'
 #' }
 update_hyperparameters <- function(..., hyperparameters, .required = NULL){
diff --git a/man/update_hyperparameters.Rd b/man/update_hyperparameters.Rd
index 79844ed..3cd9cfd 100644
--- a/man/update_hyperparameters.Rd
+++ b/man/update_hyperparameters.Rd
@@ -59,14 +59,16 @@ update_hyperparameters(
 
 # 'cost' is required
 # throws error
-xpectr::capture_side_effects(
-  update_hyperparameters(
-    kernel = "linear",
-    "scale" = FALSE,
-    hyperparameters = hparams,
-    .required = "cost"
+if (requireNamespace("xpectr", quietly = TRUE)){
+  xpectr::capture_side_effects(
+    update_hyperparameters(
+      kernel = "linear",
+      "scale" = FALSE,
+      hyperparameters = hparams,
+      .required = "cost"
+    )
   )
-)
+}
 
 }
 }