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diff --git a/README.md b/README.md
index 8246f5a..2029c69 100644
--- a/README.md
+++ b/README.md
@@ -9,11 +9,12 @@ A list of implemented (+) optimization algorithms, (-) not included in the repos
 +SIA (simulated isotropic annealing)  
 +ACS (artificial cooperative search)               
 +TSEA (turtle shell evolution algorithm)               
-+DE (differential evolution)               
++DE (differential evolution)
++CRO (chemical reaction optimisation)               
 +BSA (bird swarm algorithm)               
 -HS (harmony search)               
 -SSG (saplings sowing and growing)             
--(PO)ES ((PO) evolution strategies)               
++(PO)ES ((PO) evolution strategies)               
 +BSO (brain storm optimization)               
 +WOAm (wale optimization algorithm M)               
 -ACOm (ant colony optimization M)             
@@ -21,7 +22,7 @@ A list of implemented (+) optimization algorithms, (-) not included in the repos
 -MEC (mind evolutionary computation)               
 -IWO (invasive weed optimization)               
 -Micro-AIS (micro artificial immune system)               
--COAm (cuckoo optimization algorithm M)               
++COAm (cuckoo optimization algorithm M)               
 -SDOm (spiral dynamics optimization M)               
 -NMm (Nelder-Mead method M)               
 -FAm (firefly algorithm M)