diff --git a/NAMESPACE b/NAMESPACE
index 10847e6c..bf7460b6 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -17,10 +17,12 @@ S3method(group_by,epi_archive)
 S3method(group_by,epi_df)
 S3method(group_by,grouped_epi_archive)
 S3method(group_by_drop_default,grouped_epi_archive)
+S3method(group_modify,epi_df)
 S3method(groups,grouped_epi_archive)
 S3method(next_after,Date)
 S3method(next_after,integer)
 S3method(print,epi_df)
+S3method(summarise,epi_df)
 S3method(summary,epi_df)
 S3method(ungroup,epi_df)
 S3method(ungroup,grouped_epi_archive)
@@ -80,6 +82,7 @@ importFrom(dplyr,relocate)
 importFrom(dplyr,rename)
 importFrom(dplyr,select)
 importFrom(dplyr,slice)
+importFrom(dplyr,summarise)
 importFrom(dplyr,ungroup)
 importFrom(lubridate,days)
 importFrom(lubridate,weeks)
diff --git a/R/methods-epi_df.R b/R/methods-epi_df.R
index 503b8add..5d44eae0 100644
--- a/R/methods-epi_df.R
+++ b/R/methods-epi_df.R
@@ -187,7 +187,7 @@ ungroup.epi_df = function(x, ...) {
   reclass(x, metadata)
 }
 
-#' @method unnest epi_df
+#' @method group_modify epi_df
 #' @rdname print.epi_df
 #' @param data The `epi_df` object.
 #' @export
@@ -195,6 +195,15 @@ group_modify.epi_df = function(.data, .f, ..., .keep = FALSE) {
   dplyr::dplyr_reconstruct(NextMethod(), .data)
 }
 
+#' @method summarise epi_df
+#' @rdname print.epi_df
+#' @param data The `epi_df` object.
+#' @importFrom dplyr summarise
+#' @export
+summarise.epi_df = function(.data, .f, ..., .keep = FALSE) {
+  dplyr::dplyr_reconstruct(NextMethod(), .data)
+}
+
 #' @method unnest epi_df
 #' @rdname print.epi_df
 #' @param data The `epi_df` object.
diff --git a/man/print.epi_df.Rd b/man/print.epi_df.Rd
index 878e7f18..e24ac550 100644
--- a/man/print.epi_df.Rd
+++ b/man/print.epi_df.Rd
@@ -6,6 +6,7 @@
 \alias{group_by.epi_df}
 \alias{ungroup.epi_df}
 \alias{group_modify.epi_df}
+\alias{summarise.epi_df}
 \alias{unnest.epi_df}
 \title{Base S3 methods for an \code{epi_df} object}
 \usage{
@@ -17,7 +18,9 @@
 
 \method{ungroup}{epi_df}(x, ...)
 
-\method{unnest}{epi_df}(.data, .f, ..., .keep = FALSE)
+\method{group_modify}{epi_df}(.data, .f, ..., .keep = FALSE)
+
+\method{summarise}{epi_df}(.data, .f, ..., .keep = FALSE)
 
 \method{unnest}{epi_df}(data, ...)
 }