diff --git a/R/dash.R b/R/dash.R
index bec2b78a..7fcb0208 100644
--- a/R/dash.R
+++ b/R/dash.R
@@ -649,6 +649,8 @@ Dash <- R6::R6Class(
       getServerParam <- function(value, type, default) {
         if (!is.null(value) && toupper(value) %in% c("TRUE", "FALSE"))
           value <- as.logical(toupper(value))
+        if (type == "numeric")
+          value <- as.numeric(value)
         if (value != "" && length(value) != 0 && mode(value) == type && !is.na(value)) {
           return(value)
         } else {