diff --git a/doc/CFDEMcoupling_models.txt b/doc/CFDEMcoupling_models.txt
index a2fa44d5..246a4bb3 100644
--- a/doc/CFDEMcoupling_models.txt
+++ b/doc/CFDEMcoupling_models.txt
@@ -69,7 +69,6 @@ The {energyModels} keyword specifies a list of energy models used for e.g.
 compressible, reacting flows.
 
 heatTransferGunn,
-heatTransferGunnImplicit,
 heatTransferGunnPartField,
 reactionHeat :tb(c=2,ea=c)
 
diff --git a/doc/forceModel_noDrag.txt b/doc/forceModel_noDrag.txt
index 9e5d995b..4116aa2f 100644
--- a/doc/forceModel_noDrag.txt
+++ b/doc/forceModel_noDrag.txt
@@ -16,7 +16,7 @@ forceModels
 (
     noDrag
 ); :pre
-noDragProps (optional)
+noDragProps
 \{
     noDEMForce;
     keepCFDForce;