diff --git a/DESCRIPTION b/DESCRIPTION
index 298d987..7dc3289 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: immunedeconv
 Title: Methods for immune cell deconvolution
 Description: Collection of methods for immune cell deconvolution from bulk RNA-seq samples.
-Version: 2.1.0
+Version: 2.1.4
 Authors@R: c(
     person("Lorenzo", "Merotto", role=c("aut", "cre"), email="lorenzo.merotto@uibk.ac.at"),
     person("Gregor", "Sturm", role=c("aut"), email="mail@gregor-sturm.de")
@@ -66,4 +66,4 @@ Roxygen: list(markdown = TRUE)
 LazyData: true
 URL: https:/omnideconv.org/immunedeconv, https://github.com/omnideconv/immunedeconv
 BugReports: https://github.com/omnideconv/immunedeconv/issues
-RoxygenNote: 7.3.3
+Config/roxygen2/version: 8.0.0
diff --git a/R/cell_type_mapping.R b/R/cell_type_mapping.R
index 3bc21c8..9c6c6ae 100644
--- a/R/cell_type_mapping.R
+++ b/R/cell_type_mapping.R
@@ -134,7 +134,7 @@ summarise_children <- function(df) {
   df[set_to_zero] <- 0
 
   # finally, sum up the children.
-  df_sum <- summarise_all(df, funs(sum))
+  df_sum <- summarise(df, across(everything(), sum))
   df_sum
 }
 
diff --git a/R/immune_deconvolution_methods.R b/R/immune_deconvolution_methods.R
index 4c773a7..551f268 100644
--- a/R/immune_deconvolution_methods.R
+++ b/R/immune_deconvolution_methods.R
@@ -159,12 +159,43 @@ deconvolute_xcell <- function(gene_expression_matrix, arrays, expected_cell_type
 #' @param gene_expression_matrix a m x n matrix with m genes and n samples
 #' @param feature_types type of identifiers used for expression features. May be
 #'  one of `"affy133P2_probesets","HUGO_symbols","ENTREZ_ID"`
+#' @param log_transform  Controls whether the expression matrix is log2-transformed before
+#'  running MCP-counter. MCP-counter expects log-transformed data. One of `NULL` (default),
+#'  `TRUE`, or `FALSE`.
+#'  \itemize{
+#'    \item `NULL` – auto-detect: if `max(gene_expression_matrix) > 50` the data are assumed
+#'      to be in linear (TPM) scale and will be log2(x + 1)-transformed.
+#'    \item `TRUE` – always apply log2(x + 1) transformation.
+#'    \item `FALSE` – assume data are already log-transformed; no transformation is applied.
+#'  }
 #' @param ... passed through to original MCP-counter function. A native argument takes precedence
 #'   over an immunedeconv argument (e.g. `featureType` takes precedence over `feature_types`)
 #'  See [MCPcounter.estimate](https://github.com/ebecht/MCPcounter/blob/master/Source/R/MCPcounter.R#L19).
 #'
 #' @export
-deconvolute_mcp_counter <- function(gene_expression_matrix, feature_types = "HUGO_symbols", ...) {
+deconvolute_mcp_counter <- function(gene_expression_matrix, feature_types = "HUGO_symbols",
+                                    log_transform = NULL, ...) {
+  if (is.null(log_transform)) {
+    if (max(gene_expression_matrix, na.rm = TRUE) > 50) {
+      message(
+        "MCP-counter expects log-transformed expression data. ",
+        "The input data appears to be in linear (TPM) scale (max value > 50) and will be ",
+        "log2(x + 1)-transformed automatically. Set `log_transform = TRUE` or ",
+        "`log_transform = FALSE` to force or disable this behaviour."
+      )
+      gene_expression_matrix <- log2(as.matrix(gene_expression_matrix) + 1)
+    } else {
+      message(
+        "MCP-counter expects log-transformed expression data. ",
+        "The input data appears to be already log-transformed (max value <= 50). ",
+        "No transformation applied. Set `log_transform = TRUE` or ",
+        "`log_transform = FALSE` to override this automatic detection."
+      )
+    }
+  } else if (isTRUE(log_transform)) {
+    gene_expression_matrix <- log2(as.matrix(gene_expression_matrix) + 1)
+  }
+
   arguments <- dots_list(gene_expression_matrix, featuresType = feature_types, ..., .homonyms = "last")
   call <- rlang::call2(MCPcounter::MCPcounter.estimate, !!!arguments)
   eval(call)
diff --git a/man/available_datasets.Rd b/man/available_datasets.Rd
index 986f39c..30bb778 100644
--- a/man/available_datasets.Rd
+++ b/man/available_datasets.Rd
@@ -1,12 +1,8 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/cell_type_mapping.R
-\docType{data}
 \name{available_datasets}
 \alias{available_datasets}
 \title{Available methods and datasets.}
-\format{
-An object of class \code{character} of length 20.
-}
 \usage{
 available_datasets
 }
@@ -14,4 +10,3 @@ available_datasets
 A list of all methods (e.g. \code{cibersort}) and datasets (e.g. \code{schelker_ovarian}) for
 that the cell types are mapped to the controlled vocabulary.
 }
-\keyword{datasets}
diff --git a/man/cell_type_list.Rd b/man/cell_type_list.Rd
index 1fbb0e7..4910410 100644
--- a/man/cell_type_list.Rd
+++ b/man/cell_type_list.Rd
@@ -1,16 +1,11 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/cell_type_mapping.R
-\docType{data}
 \name{cell_type_list}
 \alias{cell_type_list}
 \title{List with controlled cell-type vocabulary}
-\format{
-An object of class \code{tbl_df} (inherits from \code{tbl}, \code{data.frame}) with 76 rows and 3 columns.
-}
 \usage{
 cell_type_list
 }
 \description{
 List with controlled cell-type vocabulary
 }
-\keyword{datasets}
diff --git a/man/cell_type_map.Rd b/man/cell_type_map.Rd
index 00f7558..afa0139 100644
--- a/man/cell_type_map.Rd
+++ b/man/cell_type_map.Rd
@@ -1,12 +1,8 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/cell_type_mapping.R
-\docType{data}
 \name{cell_type_map}
 \alias{cell_type_map}
 \title{Table mapping the cell types from methods/datasets to a single, controlled vocabulary.}
-\format{
-An object of class \code{tbl_df} (inherits from \code{tbl}, \code{data.frame}) with 258 rows and 3 columns.
-}
 \usage{
 cell_type_map
 }
@@ -16,4 +12,3 @@ Columns: \code{method_dataset}, \code{method_cell_type}, \code{cell_type}.
 \details{
 See \code{inst/extdata/cell_type_mapping.xlsx} for more details.
 }
-\keyword{datasets}
diff --git a/man/cell_type_tree.Rd b/man/cell_type_tree.Rd
index 221cbc1..1f29947 100644
--- a/man/cell_type_tree.Rd
+++ b/man/cell_type_tree.Rd
@@ -1,12 +1,8 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/cell_type_mapping.R
-\docType{data}
 \name{cell_type_tree}
 \alias{cell_type_tree}
 \title{Available cell types in the controlled vocabulary organized as a lineage tree.}
-\format{
-An object of class \code{Node} (inherits from \code{R6}) of length 41.
-}
 \usage{
 cell_type_tree
 }
@@ -16,4 +12,3 @@ Available cell types in the controlled vocabulary organized as a lineage tree.
 \details{
 a \code{data.tree} object
 }
-\keyword{datasets}
diff --git a/man/custom_deconvolution_methods.Rd b/man/custom_deconvolution_methods.Rd
index c8a1fbe..7393e48 100644
--- a/man/custom_deconvolution_methods.Rd
+++ b/man/custom_deconvolution_methods.Rd
@@ -1,12 +1,8 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/custom_deconvolution_methods.R
-\docType{data}
 \name{custom_deconvolution_methods}
 \alias{custom_deconvolution_methods}
 \title{List of methods that support the use of a custom signature}
-\format{
-An object of class \code{character} of length 4.
-}
 \usage{
 custom_deconvolution_methods
 }
@@ -18,4 +14,3 @@ The available methods are
 The object is a named vector. The names correspond to the display name of the method,
 the values to the internal name.
 }
-\keyword{datasets}
diff --git a/man/deconvolute_mcp_counter.Rd b/man/deconvolute_mcp_counter.Rd
index 71f6512..0a695a2 100644
--- a/man/deconvolute_mcp_counter.Rd
+++ b/man/deconvolute_mcp_counter.Rd
@@ -7,6 +7,7 @@
 deconvolute_mcp_counter(
   gene_expression_matrix,
   feature_types = "HUGO_symbols",
+  log_transform = NULL,
   ...
 )
 }
@@ -16,6 +17,16 @@ deconvolute_mcp_counter(
 \item{feature_types}{type of identifiers used for expression features. May be
 one of \verb{"affy133P2_probesets","HUGO_symbols","ENTREZ_ID"}}
 
+\item{log_transform}{Controls whether the expression matrix is log2-transformed before
+running MCP-counter. MCP-counter expects log-transformed data. One of \code{NULL} (default),
+\code{TRUE}, or \code{FALSE}.
+\itemize{
+\item \code{NULL} – auto-detect: if \code{max(gene_expression_matrix) > 50} the data are assumed
+to be in linear (TPM) scale and will be log2(x + 1)-transformed.
+\item \code{TRUE} – always apply log2(x + 1) transformation.
+\item \code{FALSE} – assume data are already log-transformed; no transformation is applied.
+}}
+
 \item{...}{passed through to original MCP-counter function. A native argument takes precedence
 over an immunedeconv argument (e.g. \code{featureType} takes precedence over \code{feature_types})
 See \href{https://github.com/ebecht/MCPcounter/blob/master/Source/R/MCPcounter.R#L19}{MCPcounter.estimate}.}
diff --git a/man/deconvolution_methods.Rd b/man/deconvolution_methods.Rd
index 3796009..86e2b7f 100644
--- a/man/deconvolution_methods.Rd
+++ b/man/deconvolution_methods.Rd
@@ -1,12 +1,8 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/immune_deconvolution_methods.R
-\docType{data}
 \name{deconvolution_methods}
 \alias{deconvolution_methods}
 \title{List of supported immune deconvolution methods}
-\format{
-An object of class \code{character} of length 10.
-}
 \usage{
 deconvolution_methods
 }
@@ -18,4 +14,3 @@ The methods currently supported are
 The object is a named vector. The names correspond to the display name of the method,
 the values to the internal name.
 }
-\keyword{datasets}
diff --git a/man/deconvolution_methods_mouse.Rd b/man/deconvolution_methods_mouse.Rd
index 6754db1..b4a1196 100644
--- a/man/deconvolution_methods_mouse.Rd
+++ b/man/deconvolution_methods_mouse.Rd
@@ -1,6 +1,5 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/mouse_deconvolution_methods.R
-\docType{data}
 \name{deconvolution_methods_mouse}
 \alias{deconvolution_methods_mouse}
 \title{List of supported mouse deconvolution methods
@@ -8,9 +7,6 @@ The methods currently supported are
 \code{mmcp_counter}, \code{seqimmucc}, \code{dcq}, \code{base}
 The object is a named vector. The names correspond to the display name of the method,
 the values to the internal name.}
-\format{
-An object of class \code{character} of length 4.
-}
 \usage{
 deconvolution_methods_mouse
 }
@@ -21,4 +17,3 @@ The methods currently supported are
 The object is a named vector. The names correspond to the display name of the method,
 the values to the internal name.
 }
-\keyword{datasets}
diff --git a/man/immunedeconv.Rd b/man/immunedeconv.Rd
index ab241d1..737e10f 100644
--- a/man/immunedeconv.Rd
+++ b/man/immunedeconv.Rd
@@ -12,7 +12,7 @@ estimating immune cell fractions from bulk RNA sequencing data.
 \seealso{
 Useful links:
 \itemize{
-  \item \url{https:/omnideconv.org/immunedeconv}
+  \item https:/omnideconv.org/immunedeconv
   \item \url{https://github.com/omnideconv/immunedeconv}
   \item Report bugs at \url{https://github.com/omnideconv/immunedeconv/issues}
 }
@@ -23,6 +23,7 @@ Useful links:
 
 Authors:
 \itemize{
+  \item Lorenzo Merotto \email{lorenzo.merotto@uibk.ac.at}
   \item Gregor Sturm \email{mail@gregor-sturm.de}
 }
 
diff --git a/man/node_by_name.Rd b/man/node_by_name.Rd
index 04eccb6..93f8e96 100644
--- a/man/node_by_name.Rd
+++ b/man/node_by_name.Rd
@@ -1,12 +1,8 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/cell_type_mapping.R
-\docType{data}
 \name{node_by_name}
 \alias{node_by_name}
 \title{Lookup dictionary for cell-type nodes}
-\format{
-An object of class \code{list} of length 77.
-}
 \usage{
 node_by_name
 }
@@ -14,4 +10,3 @@ node_by_name
 Access nodes by name in O(1). Node names are unique in our tree.
 gets attached on .onLoad, see zzz.R
 }
-\keyword{datasets}
diff --git a/man/timer_available_cancers.Rd b/man/timer_available_cancers.Rd
index b892445..8a9b5e4 100644
--- a/man/timer_available_cancers.Rd
+++ b/man/timer_available_cancers.Rd
@@ -1,16 +1,11 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/timer.R
-\docType{data}
 \name{timer_available_cancers}
 \alias{timer_available_cancers}
 \title{TIMER signatures are cancer specific. This is the list of available cancer types.}
-\format{
-An object of class \code{character} of length 32.
-}
 \usage{
 timer_available_cancers
 }
 \description{
 TIMER signatures are cancer specific. This is the list of available cancer types.
 }
-\keyword{datasets}
diff --git a/man/xCell.data.Rd b/man/xCell.data.Rd
index ece30fc..50ba07f 100644
--- a/man/xCell.data.Rd
+++ b/man/xCell.data.Rd
@@ -1,12 +1,8 @@
 % Generated by roxygen2: do not edit by hand
 % Please edit documentation in R/immune_deconvolution_methods.R
-\docType{data}
 \name{xCell.data}
 \alias{xCell.data}
 \title{Data object from xCell.}
-\format{
-An object of class \code{list} of length 4.
-}
 \usage{
 xCell.data
 }
@@ -14,4 +10,3 @@ xCell.data
 For some reason, this object is not properly exported from the xCell namespace.
 This is a workaround, that \code{xCellAnalysis} can be properly called from this package.
 }
-\keyword{datasets}
diff --git a/tests/testthat/test_deconvolution.R b/tests/testthat/test_deconvolution.R
index 23905de..c264764 100644
--- a/tests/testthat/test_deconvolution.R
+++ b/tests/testthat/test_deconvolution.R
@@ -41,6 +41,45 @@ test_that("mcp_counter works", {
   assert("matrix dimensions consistent", ncol(res) == ncol(test_mat))
 })
 
+test_that("mcp_counter log_transform auto-detects raw TPM data", {
+  # test_mat has max value > 50, so auto-detection should log-transform
+  expect_message(
+    res <- deconvolute_mcp_counter(test_mat),
+    "log2\\(x \\+ 1\\)-transformed automatically"
+  )
+  assert("matrix dimensions consistent", ncol(res) == ncol(test_mat))
+})
+
+test_that("mcp_counter log_transform auto-detects already log-transformed data", {
+  log_mat <- log2(test_mat + 1)
+  # max value should be <= 50, so auto-detection should not transform
+  expect_message(
+    res <- deconvolute_mcp_counter(log_mat),
+    "appears to be already log-transformed"
+  )
+  assert("matrix dimensions consistent", ncol(res) == ncol(log_mat))
+})
+
+test_that("mcp_counter log_transform NULL and TRUE give same result for raw TPM", {
+  # test_mat is raw TPM (max > 50), so NULL should auto-transform just like TRUE
+  suppressMessages(res_null <- deconvolute_mcp_counter(test_mat, log_transform = NULL))
+  res_true <- deconvolute_mcp_counter(test_mat, log_transform = TRUE)
+  expect_equal(res_null, res_true)
+})
+
+test_that("mcp_counter log_transform NULL and FALSE give same result for log-transformed data", {
+  log_mat <- log2(test_mat + 1)
+  # log_mat is already log-transformed (max <= 50), so NULL should skip like FALSE
+  suppressMessages(res_null <- deconvolute_mcp_counter(log_mat, log_transform = NULL))
+  res_false <- deconvolute_mcp_counter(log_mat, log_transform = FALSE)
+  expect_equal(res_null, res_false)
+})
+
+test_that("mcp_counter log_transform can be passed via deconvolute", {
+  res <- deconvolute(test_mat, "mcp_counter", log_transform = FALSE)
+  assert("matrix dimensions consistent", ncol(res) == ncol(test_mat) + 1)
+})
+
 test_that("epic works", {
   res <- deconvolute_epic(test_mat, tumor = TRUE, scale_mrna = TRUE)
   assert("matrix dimensions consistent", ncol(res) == ncol(test_mat))