Question: solve non linear DE numerically

hi Maplers
I want to solve the following differential equation numerically. but i get error

restart;
eqn := (diff(H(K),K))^3+4*K^4*H(K)^4*diff(H(K),K)+8*K^4*H(K)^5=0;
ics := H(0)=1/2;
sol := dsolve({eqn,ics},numeric);
Error, (in DEtools/convertsys) unable to convert to an explicit first-order system
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