diff --git a/README.md b/README.md
index 2ed30b0f..31bf5994 100644
--- a/README.md
+++ b/README.md
@@ -1874,7 +1874,8 @@ Next time you need this list just use an alias, like this:
       * Valid keys:
         - `convert_from`: [string='markdown'] Original format for the report conversion. Current templates are `markdown`. See `do_convert`.
         - `convert_to`: [string='pdf'] Target format for the report conversion. See `do_convert`.
-        - `converted_output`: [string='%f-%i%I%v.%x'] Converted output file name (%i='report', %x=`convert_to`). Affected by global options.
+        - `converted_output`: [string='%f-%i%I%v.%x'] Converted output file name (%i='report', %x=`convert_to`).
+                              Note that the extension should match the `convert_to` value. Affected by global options.
         - `do_convert`: [boolean=false] Run `Pandoc` to convert the report. Note that Pandoc must be installed.
                         The conversion is done assuming the report is in `convert_from` format.
                         The output file will be in `convert_to` format.
diff --git a/docs/samples/generic_plot.kibot.yaml b/docs/samples/generic_plot.kibot.yaml
index 3b0dc75f..7ceaffc0 100644
--- a/docs/samples/generic_plot.kibot.yaml
+++ b/docs/samples/generic_plot.kibot.yaml
@@ -1310,7 +1310,8 @@ outputs:
       convert_from: 'markdown'
       # [string='pdf'] Target format for the report conversion. See `do_convert`
       convert_to: 'pdf'
-      # [string='%f-%i%I%v.%x'] Converted output file name (%i='report', %x=`convert_to`). Affected by global options
+      # [string='%f-%i%I%v.%x'] Converted output file name (%i='report', %x=`convert_to`).
+      # Note that the extension should match the `convert_to` value. Affected by global options
       converted_output: '%f-%i%I%v.%x'
       # [boolean=false] Run `Pandoc` to convert the report. Note that Pandoc must be installed.
       # The conversion is done assuming the report is in `convert_from` format.
diff --git a/kibot/misc.py b/kibot/misc.py
index 6710c77f..b2ab1bc7 100644
--- a/kibot/misc.py
+++ b/kibot/misc.py
@@ -225,6 +225,7 @@ W_MIXVARIANT = '(W079) '
 W_NOTPDF = '(W080) '
 W_NOREF = '(W081) '
 W_UNKVAR = '(W082) '
+W_WRONGEXT = '(W083) '
 # Somehow arbitrary, the colors are real, but can be different
 PCB_MAT_COLORS = {'fr1': "937042", 'fr2': "949d70", 'fr3': "adacb4", 'fr4': "332B16", 'fr5': "6cc290"}
 PCB_FINISH_COLORS = {'hal': "8b898c", 'hasl': "8b898c", 'imag': "8b898c", 'enig': "cfb96e", 'enepig': "cfb96e",
diff --git a/kibot/out_report.py b/kibot/out_report.py
index fd057f99..e58cbe4a 100644
--- a/kibot/out_report.py
+++ b/kibot/out_report.py
@@ -10,7 +10,7 @@ from subprocess import check_output, STDOUT, CalledProcessError
 
 from .gs import GS
 from .misc import (UI_SMD, UI_VIRTUAL, MOD_THROUGH_HOLE, MOD_SMD, MOD_EXCLUDE_FROM_POS_FILES, PANDOC, MISSING_TOOL,
-                   FAILED_EXECUTE)
+                   FAILED_EXECUTE, W_WRONGEXT)
 from .registrable import RegOutput
 from .out_base import BaseOptions
 from .error import KiPlotConfigurationError
@@ -129,7 +129,8 @@ class ReportOptions(BaseOptions):
                 The output file will be in `convert_to` format.
                 The available formats depends on the `Pandoc` installation """
             self.converted_output = GS.def_global_output
-            """ Converted output file name (%i='report', %x=`convert_to`) """
+            """ Converted output file name (%i='report', %x=`convert_to`).
+                Note that the extension should match the `convert_to` value """
         super().__init__()
         self._expand_id = 'report'
         self._expand_ext = 'txt'
@@ -609,7 +610,10 @@ class ReportOptions(BaseOptions):
         out = self.expand_converted_output(GS.out_dir)
         logger.debug('Converting the report to: {}'.format(out))
         resources = '--resource-path='+GS.out_dir
-        cmd = [PANDOC, '--from', self.convert_from, '--to', self.convert_to, resources, fname, '-o', out]
+        # Pandoc 2.2.1 doesn't support "--to pdf"
+        if not out.endswith('.'+self.convert_to):
+            logger.warning(W_WRONGEXT+'The conversion tool detects the output format using the extension')
+        cmd = [PANDOC, '--from', self.convert_from, resources, fname, '-o', out]
         logger.debug('Executing {}'.format(cmd))
         try:
             check_output(cmd, stderr=STDOUT)